{
    "file_diffs": [
        {
            "old_file_content": "import tempfile\n\nfrom PIL import Image, ImageSequence, SpiderImagePlugin\n\nfrom .helper import PillowTestCase, hopper\n\nTEST_FILE = \"Tests/images/hopper.spider\"\n\n\nclass TestImageSpider(PillowTestCase):\n    def test_sanity(self):\n        im = Image.open(TEST_FILE)\n        im.load()\n        self.assertEqual(im.mode, \"F\")\n        self.assertEqual(im.size, (128, 128))\n        self.assertEqual(im.format, \"SPIDER\")\n\n    def test_unclosed_file(self):\n        def open():\n            im = Image.open(TEST_FILE)\n            im.load()\n\n        self.assert_warning(None, open)\n\n    def test_save(self):\n        # Arrange\n        temp = self.tempfile(\"temp.spider\")\n        im = hopper()\n\n        # Act\n        im.save(temp, \"SPIDER\")\n\n        # Assert\n        im2 = Image.open(temp)\n        self.assertEqual(im2.mode, \"F\")\n        self.assertEqual(im2.size, (128, 128))\n        self.assertEqual(im2.format, \"SPIDER\")\n\n    def test_tempfile(self):\n        # Arrange\n        im = hopper()\n\n        # Act\n        with tempfile.TemporaryFile() as fp:\n            im.save(fp, \"SPIDER\")\n\n            # Assert\n            fp.seek(0)\n            reloaded = Image.open(fp)\n            self.assertEqual(reloaded.mode, \"F\")\n            self.assertEqual(reloaded.size, (128, 128))\n            self.assertEqual(reloaded.format, \"SPIDER\")\n\n    def test_isSpiderImage(self):\n        self.assertTrue(SpiderImagePlugin.isSpiderImage(TEST_FILE))\n\n    def test_tell(self):\n        # Arrange\n        im = Image.open(TEST_FILE)\n\n        # Act\n        index = im.tell()\n\n        # Assert\n        self.assertEqual(index, 0)\n\n    def test_n_frames(self):\n        im = Image.open(TEST_FILE)\n        self.assertEqual(im.n_frames, 1)\n        self.assertFalse(im.is_animated)\n\n    def test_loadImageSeries(self):\n        # Arrange\n        not_spider_file = \"Tests/images/hopper.ppm\"\n        file_list = [TEST_FILE, not_spider_file, \"path/not_found.ext\"]\n\n        # Act\n        img_list = SpiderImagePlugin.loadImageSeries(file_list)\n\n        # Assert\n        self.assertEqual(len(img_list), 1)\n        self.assertIsInstance(img_list[0], Image.Image)\n        self.assertEqual(img_list[0].size, (128, 128))\n\n    def test_loadImageSeries_no_input(self):\n        # Arrange\n        file_list = None\n\n        # Act\n        img_list = SpiderImagePlugin.loadImageSeries(file_list)\n\n        # Assert\n        self.assertIsNone(img_list)\n\n    def test_isInt_not_a_number(self):\n        # Arrange\n        not_a_number = \"a\"\n\n        # Act\n        ret = SpiderImagePlugin.isInt(not_a_number)\n\n        # Assert\n        self.assertEqual(ret, 0)\n\n    def test_invalid_file(self):\n        invalid_file = \"Tests/images/invalid.spider\"\n\n        self.assertRaises(IOError, Image.open, invalid_file)\n\n    def test_nonstack_file(self):\n        im = Image.open(TEST_FILE)\n\n        self.assertRaises(EOFError, im.seek, 0)\n\n    def test_nonstack_dos(self):\n        im = Image.open(TEST_FILE)\n        for i, frame in enumerate(ImageSequence.Iterator(im)):\n            if i > 1:\n                self.fail(\"Non-stack DOS file test failed\")\n",
            "new_file_content": "import tempfile\nfrom io import BytesIO\n\nfrom PIL import Image, ImageSequence, SpiderImagePlugin\n\nfrom .helper import PillowTestCase, hopper\n\nTEST_FILE = \"Tests/images/hopper.spider\"\n\n\nclass TestImageSpider(PillowTestCase):\n    def test_sanity(self):\n        im = Image.open(TEST_FILE)\n        im.load()\n        self.assertEqual(im.mode, \"F\")\n        self.assertEqual(im.size, (128, 128))\n        self.assertEqual(im.format, \"SPIDER\")\n\n    def test_unclosed_file(self):\n        def open():\n            im = Image.open(TEST_FILE)\n            im.load()\n\n        self.assert_warning(None, open)\n\n    def test_save(self):\n        # Arrange\n        temp = self.tempfile(\"temp.spider\")\n        im = hopper()\n\n        # Act\n        im.save(temp, \"SPIDER\")\n\n        # Assert\n        im2 = Image.open(temp)\n        self.assertEqual(im2.mode, \"F\")\n        self.assertEqual(im2.size, (128, 128))\n        self.assertEqual(im2.format, \"SPIDER\")\n\n    def test_tempfile(self):\n        # Arrange\n        im = hopper()\n\n        # Act\n        with tempfile.TemporaryFile() as fp:\n            im.save(fp, \"SPIDER\")\n\n            # Assert\n            fp.seek(0)\n            reloaded = Image.open(fp)\n            self.assertEqual(reloaded.mode, \"F\")\n            self.assertEqual(reloaded.size, (128, 128))\n            self.assertEqual(reloaded.format, \"SPIDER\")\n\n    def test_isSpiderImage(self):\n        self.assertTrue(SpiderImagePlugin.isSpiderImage(TEST_FILE))\n\n    def test_tell(self):\n        # Arrange\n        im = Image.open(TEST_FILE)\n\n        # Act\n        index = im.tell()\n\n        # Assert\n        self.assertEqual(index, 0)\n\n    def test_n_frames(self):\n        im = Image.open(TEST_FILE)\n        self.assertEqual(im.n_frames, 1)\n        self.assertFalse(im.is_animated)\n\n    def test_loadImageSeries(self):\n        # Arrange\n        not_spider_file = \"Tests/images/hopper.ppm\"\n        file_list = [TEST_FILE, not_spider_file, \"path/not_found.ext\"]\n\n        # Act\n        img_list = SpiderImagePlugin.loadImageSeries(file_list)\n\n        # Assert\n        self.assertEqual(len(img_list), 1)\n        self.assertIsInstance(img_list[0], Image.Image)\n        self.assertEqual(img_list[0].size, (128, 128))\n\n    def test_loadImageSeries_no_input(self):\n        # Arrange\n        file_list = None\n\n        # Act\n        img_list = SpiderImagePlugin.loadImageSeries(file_list)\n\n        # Assert\n        self.assertIsNone(img_list)\n\n    def test_isInt_not_a_number(self):\n        # Arrange\n        not_a_number = \"a\"\n\n        # Act\n        ret = SpiderImagePlugin.isInt(not_a_number)\n\n        # Assert\n        self.assertEqual(ret, 0)\n\n    def test_invalid_file(self):\n        invalid_file = \"Tests/images/invalid.spider\"\n\n        self.assertRaises(IOError, Image.open, invalid_file)\n\n    def test_nonstack_file(self):\n        im = Image.open(TEST_FILE)\n\n        self.assertRaises(EOFError, im.seek, 0)\n\n    def test_nonstack_dos(self):\n        im = Image.open(TEST_FILE)\n        for i, frame in enumerate(ImageSequence.Iterator(im)):\n            if i > 1:\n                self.fail(\"Non-stack DOS file test failed\")\n\n    # for issue #4093\n    def test_odd_size(self):\n        data = BytesIO()\n        width = 100\n        im = Image.new(\"F\", (width, 64))\n        im.save(data, format=\"SPIDER\")\n\n        data.seek(0)\n        im2 = Image.open(data)\n        self.assert_image_equal(im, im2)\n",
            "header": {
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                    "path": "Tests/test_file_spider.py"
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                "new_commit_hash": "340208486",
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            "binary_line": null,
            "minus_file": {
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                        "old_range": {
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                    "line_group": {
                        "all_lines": [
                            {
                                "content": "import tempfile",
                                "type": "context"
                            },
                            {
                                "content": "from io import BytesIO",
                                "type": "added"
                            },
                            {
                                "content": "",
                                "type": "context"
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                            {
                                "content": "from PIL import Image, ImageSequence, SpiderImagePlugin",
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                            "file_name": "Tests/test_file_spider.py",
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                            "end_lineno": 2,
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                    "descriptor": {
                        "old_range": {
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                        "section": "class TestImageSpider(PillowTestCase):"
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                            {
                                "content": "        for i, frame in enumerate(ImageSequence.Iterator(im)):",
                                "type": "context"
                            },
                            {
                                "content": "            if i > 1:",
                                "type": "context"
                            },
                            {
                                "content": "                self.fail(\"Non-stack DOS file test failed\")",
                                "type": "context"
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                            {
                                "content": "",
                                "type": "added"
                            },
                            {
                                "content": "    # for issue #4093",
                                "type": "added"
                            },
                            {
                                "content": "    def test_odd_size(self):",
                                "type": "added"
                            },
                            {
                                "content": "        data = BytesIO()",
                                "type": "added"
                            },
                            {
                                "content": "        width = 100",
                                "type": "added"
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                            {
                                "content": "        im = Image.new(\"F\", (width, 64))",
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                                "content": "        im2 = Image.open(data)",
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                        {
                            "file_name": "Tests/test_file_spider.py",
                            "type": "class",
                            "name": "TestImageSpider",
                            "content": "class TestImageSpider(PillowTestCase):\n    def test_sanity(self):\n        im = Image.open(TEST_FILE)\n        im.load()\n        self.assertEqual(im.mode, \"F\")\n        self.assertEqual(im.size, (128, 128))\n        self.assertEqual(im.format, \"SPIDER\")\n\n    def test_unclosed_file(self):\n        def open():\n            im = Image.open(TEST_FILE)\n            im.load()\n\n        self.assert_warning(None, open)\n\n    def test_save(self):\n        # Arrange\n        temp = self.tempfile(\"temp.spider\")\n        im = hopper()\n\n        # Act\n        im.save(temp, \"SPIDER\")\n\n        # Assert\n        im2 = Image.open(temp)\n        self.assertEqual(im2.mode, \"F\")\n        self.assertEqual(im2.size, (128, 128))\n        self.assertEqual(im2.format, \"SPIDER\")\n\n    def test_tempfile(self):\n        # Arrange\n        im = hopper()\n\n        # Act\n        with tempfile.TemporaryFile() as fp:\n            im.save(fp, \"SPIDER\")\n\n            # Assert\n            fp.seek(0)\n            reloaded = Image.open(fp)\n            self.assertEqual(reloaded.mode, \"F\")\n            self.assertEqual(reloaded.size, (128, 128))\n            self.assertEqual(reloaded.format, \"SPIDER\")\n\n    def test_isSpiderImage(self):\n        self.assertTrue(SpiderImagePlugin.isSpiderImage(TEST_FILE))\n\n    def test_tell(self):\n        # Arrange\n        im = Image.open(TEST_FILE)\n\n        # Act\n        index = im.tell()\n\n        # Assert\n        self.assertEqual(index, 0)\n\n    def test_n_frames(self):\n        im = Image.open(TEST_FILE)\n        self.assertEqual(im.n_frames, 1)\n        self.assertFalse(im.is_animated)\n\n    def test_loadImageSeries(self):\n        # Arrange\n        not_spider_file = \"Tests/images/hopper.ppm\"\n        file_list = [TEST_FILE, not_spider_file, \"path/not_found.ext\"]\n\n        # Act\n        img_list = SpiderImagePlugin.loadImageSeries(file_list)\n\n        # Assert\n        self.assertEqual(len(img_list), 1)\n        self.assertIsInstance(img_list[0], Image.Image)\n        self.assertEqual(img_list[0].size, (128, 128))\n\n    def test_loadImageSeries_no_input(self):\n        # Arrange\n        file_list = None\n\n        # Act\n        img_list = SpiderImagePlugin.loadImageSeries(file_list)\n\n        # Assert\n        self.assertIsNone(img_list)\n\n    def test_isInt_not_a_number(self):\n        # Arrange\n        not_a_number = \"a\"\n\n        # Act\n        ret = SpiderImagePlugin.isInt(not_a_number)\n\n        # Assert\n        self.assertEqual(ret, 0)\n\n    def test_invalid_file(self):\n        invalid_file = \"Tests/images/invalid.spider\"\n\n        self.assertRaises(IOError, Image.open, invalid_file)\n\n    def test_nonstack_file(self):\n        im = Image.open(TEST_FILE)\n\n        self.assertRaises(EOFError, im.seek, 0)\n\n    def test_nonstack_dos(self):\n        im = Image.open(TEST_FILE)\n        for i, frame in enumerate(ImageSequence.Iterator(im)):\n            if i > 1:\n                self.fail(\"Non-stack DOS file test failed\")\n\n    # for issue #4093\n    def test_odd_size(self):\n        data = BytesIO()\n        width = 100\n        im = Image.new(\"F\", (width, 64))\n        im.save(data, format=\"SPIDER\")\n\n        data.seek(0)\n        im2 = Image.open(data)\n        self.assert_image_equal(im, im2)",
                            "ast_type_str": "ClassDef",
                            "start_lineno": 11,
                            "end_lineno": 131,
                            "parent": null
                        }
                    ],
                    "added_entities": [
                        {
                            "file_name": "Tests/test_file_spider.py",
                            "type": "method",
                            "name": "TestImageSpider.test_odd_size",
                            "content": "class TestImageSpider(PillowTestCase):\n    def test_sanity(self):\n        im = Image.open(TEST_FILE)\n        im.load()\n        self.assertEqual(im.mode, \"F\")\n        self.assertEqual(im.size, (128, 128))\n        self.assertEqual(im.format, \"SPIDER\")\n\n    def test_unclosed_file(self):\n        def open():\n            im = Image.open(TEST_FILE)\n            im.load()\n\n        self.assert_warning(None, open)\n\n    def test_save(self):\n        # Arrange\n        temp = self.tempfile(\"temp.spider\")\n        im = hopper()\n\n        # Act\n        im.save(temp, \"SPIDER\")\n\n        # Assert\n        im2 = Image.open(temp)\n        self.assertEqual(im2.mode, \"F\")\n        self.assertEqual(im2.size, (128, 128))\n        self.assertEqual(im2.format, \"SPIDER\")\n\n    def test_tempfile(self):\n        # Arrange\n        im = hopper()\n\n        # Act\n        with tempfile.TemporaryFile() as fp:\n            im.save(fp, \"SPIDER\")\n\n            # Assert\n            fp.seek(0)\n            reloaded = Image.open(fp)\n            self.assertEqual(reloaded.mode, \"F\")\n            self.assertEqual(reloaded.size, (128, 128))\n            self.assertEqual(reloaded.format, \"SPIDER\")\n\n    def test_isSpiderImage(self):\n        self.assertTrue(SpiderImagePlugin.isSpiderImage(TEST_FILE))\n\n    def test_tell(self):\n        # Arrange\n        im = Image.open(TEST_FILE)\n\n        # Act\n        index = im.tell()\n\n        # Assert\n        self.assertEqual(index, 0)\n\n    def test_n_frames(self):\n        im = Image.open(TEST_FILE)\n        self.assertEqual(im.n_frames, 1)\n        self.assertFalse(im.is_animated)\n\n    def test_loadImageSeries(self):\n        # Arrange\n        not_spider_file = \"Tests/images/hopper.ppm\"\n        file_list = [TEST_FILE, not_spider_file, \"path/not_found.ext\"]\n\n        # Act\n        img_list = SpiderImagePlugin.loadImageSeries(file_list)\n\n        # Assert\n        self.assertEqual(len(img_list), 1)\n        self.assertIsInstance(img_list[0], Image.Image)\n        self.assertEqual(img_list[0].size, (128, 128))\n\n    def test_loadImageSeries_no_input(self):\n        # Arrange\n        file_list = None\n\n        # Act\n        img_list = SpiderImagePlugin.loadImageSeries(file_list)\n\n        # Assert\n        self.assertIsNone(img_list)\n\n    def test_isInt_not_a_number(self):\n        # Arrange\n        not_a_number = \"a\"\n\n        # Act\n        ret = SpiderImagePlugin.isInt(not_a_number)\n\n        # Assert\n        self.assertEqual(ret, 0)\n\n    def test_invalid_file(self):\n        invalid_file = \"Tests/images/invalid.spider\"\n\n        self.assertRaises(IOError, Image.open, invalid_file)\n\n    def test_nonstack_file(self):\n        im = Image.open(TEST_FILE)\n\n        self.assertRaises(EOFError, im.seek, 0)\n\n    def test_nonstack_dos(self):\n        im = Image.open(TEST_FILE)\n        for i, frame in enumerate(ImageSequence.Iterator(im)):\n            if i > 1:\n                self.fail(\"Non-stack DOS file test failed\")\n\n    # for issue #4093\n    def test_odd_size(self):\n        data = BytesIO()\n        width = 100\n        im = Image.new(\"F\", (width, 64))\n        im.save(data, format=\"SPIDER\")\n\n        data.seek(0)\n        im2 = Image.open(data)\n        self.assert_image_equal(im, im2)",
                            "ast_type_str": "ClassDef",
                            "start_lineno": 123,
                            "end_lineno": 131,
                            "parent": {
                                "file_name": "Tests/test_file_spider.py",
                                "type": "class",
                                "name": "TestImageSpider",
                                "content": "class TestImageSpider(PillowTestCase):\n    def test_sanity(self):\n        im = Image.open(TEST_FILE)\n        im.load()\n        self.assertEqual(im.mode, \"F\")\n        self.assertEqual(im.size, (128, 128))\n        self.assertEqual(im.format, \"SPIDER\")\n\n    def test_unclosed_file(self):\n        def open():\n            im = Image.open(TEST_FILE)\n            im.load()\n\n        self.assert_warning(None, open)\n\n    def test_save(self):\n        # Arrange\n        temp = self.tempfile(\"temp.spider\")\n        im = hopper()\n\n        # Act\n        im.save(temp, \"SPIDER\")\n\n        # Assert\n        im2 = Image.open(temp)\n        self.assertEqual(im2.mode, \"F\")\n        self.assertEqual(im2.size, (128, 128))\n        self.assertEqual(im2.format, \"SPIDER\")\n\n    def test_tempfile(self):\n        # Arrange\n        im = hopper()\n\n        # Act\n        with tempfile.TemporaryFile() as fp:\n            im.save(fp, \"SPIDER\")\n\n            # Assert\n            fp.seek(0)\n            reloaded = Image.open(fp)\n            self.assertEqual(reloaded.mode, \"F\")\n            self.assertEqual(reloaded.size, (128, 128))\n            self.assertEqual(reloaded.format, \"SPIDER\")\n\n    def test_isSpiderImage(self):\n        self.assertTrue(SpiderImagePlugin.isSpiderImage(TEST_FILE))\n\n    def test_tell(self):\n        # Arrange\n        im = Image.open(TEST_FILE)\n\n        # Act\n        index = im.tell()\n\n        # Assert\n        self.assertEqual(index, 0)\n\n    def test_n_frames(self):\n        im = Image.open(TEST_FILE)\n        self.assertEqual(im.n_frames, 1)\n        self.assertFalse(im.is_animated)\n\n    def test_loadImageSeries(self):\n        # Arrange\n        not_spider_file = \"Tests/images/hopper.ppm\"\n        file_list = [TEST_FILE, not_spider_file, \"path/not_found.ext\"]\n\n        # Act\n        img_list = SpiderImagePlugin.loadImageSeries(file_list)\n\n        # Assert\n        self.assertEqual(len(img_list), 1)\n        self.assertIsInstance(img_list[0], Image.Image)\n        self.assertEqual(img_list[0].size, (128, 128))\n\n    def test_loadImageSeries_no_input(self):\n        # Arrange\n        file_list = None\n\n        # Act\n        img_list = SpiderImagePlugin.loadImageSeries(file_list)\n\n        # Assert\n        self.assertIsNone(img_list)\n\n    def test_isInt_not_a_number(self):\n        # Arrange\n        not_a_number = \"a\"\n\n        # Act\n        ret = SpiderImagePlugin.isInt(not_a_number)\n\n        # Assert\n        self.assertEqual(ret, 0)\n\n    def test_invalid_file(self):\n        invalid_file = \"Tests/images/invalid.spider\"\n\n        self.assertRaises(IOError, Image.open, invalid_file)\n\n    def test_nonstack_file(self):\n        im = Image.open(TEST_FILE)\n\n        self.assertRaises(EOFError, im.seek, 0)\n\n    def test_nonstack_dos(self):\n        im = Image.open(TEST_FILE)\n        for i, frame in enumerate(ImageSequence.Iterator(im)):\n            if i > 1:\n                self.fail(\"Non-stack DOS file test failed\")\n\n    # for issue #4093\n    def test_odd_size(self):\n        data = BytesIO()\n        width = 100\n        im = Image.new(\"F\", (width, 64))\n        im.save(data, format=\"SPIDER\")\n\n        data.seek(0)\n        im2 = Image.open(data)\n        self.assert_image_equal(im, im2)",
                                "ast_type_str": "ClassDef",
                                "start_lineno": 11,
                                "end_lineno": 131,
                                "parent": null
                            }
                        }
                    ],
                    "deleted_entities": []
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            ]
        },
        {
            "old_file_content": "#\n# The Python Imaging Library.\n#\n# SPIDER image file handling\n#\n# History:\n# 2004-08-02    Created BB\n# 2006-03-02    added save method\n# 2006-03-13    added support for stack images\n#\n# Copyright (c) 2004 by Health Research Inc. (HRI) RENSSELAER, NY 12144.\n# Copyright (c) 2004 by William Baxter.\n# Copyright (c) 2004 by Secret Labs AB.\n# Copyright (c) 2004 by Fredrik Lundh.\n#\n\n##\n# Image plugin for the Spider image format.  This format is is used\n# by the SPIDER software, in processing image data from electron\n# microscopy and tomography.\n##\n\n#\n# SpiderImagePlugin.py\n#\n# The Spider image format is used by SPIDER software, in processing\n# image data from electron microscopy and tomography.\n#\n# Spider home page:\n# https://spider.wadsworth.org/spider_doc/spider/docs/spider.html\n#\n# Details about the Spider image format:\n# https://spider.wadsworth.org/spider_doc/spider/docs/image_doc.html\n#\n\nfrom __future__ import print_function\n\nimport os\nimport struct\nimport sys\n\nfrom PIL import Image, ImageFile\n\n\ndef isInt(f):\n    try:\n        i = int(f)\n        if f - i == 0:\n            return 1\n        else:\n            return 0\n    except (ValueError, OverflowError):\n        return 0\n\n\niforms = [1, 3, -11, -12, -21, -22]\n\n\n# There is no magic number to identify Spider files, so just check a\n# series of header locations to see if they have reasonable values.\n# Returns no. of bytes in the header, if it is a valid Spider header,\n# otherwise returns 0\n\n\ndef isSpiderHeader(t):\n    h = (99,) + t  # add 1 value so can use spider header index start=1\n    # header values 1,2,5,12,13,22,23 should be integers\n    for i in [1, 2, 5, 12, 13, 22, 23]:\n        if not isInt(h[i]):\n            return 0\n    # check iform\n    iform = int(h[5])\n    if iform not in iforms:\n        return 0\n    # check other header values\n    labrec = int(h[13])  # no. records in file header\n    labbyt = int(h[22])  # total no. of bytes in header\n    lenbyt = int(h[23])  # record length in bytes\n    if labbyt != (labrec * lenbyt):\n        return 0\n    # looks like a valid header\n    return labbyt\n\n\ndef isSpiderImage(filename):\n    with open(filename, \"rb\") as fp:\n        f = fp.read(92)  # read 23 * 4 bytes\n    t = struct.unpack(\">23f\", f)  # try big-endian first\n    hdrlen = isSpiderHeader(t)\n    if hdrlen == 0:\n        t = struct.unpack(\"<23f\", f)  # little-endian\n        hdrlen = isSpiderHeader(t)\n    return hdrlen\n\n\nclass SpiderImageFile(ImageFile.ImageFile):\n\n    format = \"SPIDER\"\n    format_description = \"Spider 2D image\"\n    _close_exclusive_fp_after_loading = False\n\n    def _open(self):\n        # check header\n        n = 27 * 4  # read 27 float values\n        f = self.fp.read(n)\n\n        try:\n            self.bigendian = 1\n            t = struct.unpack(\">27f\", f)  # try big-endian first\n            hdrlen = isSpiderHeader(t)\n            if hdrlen == 0:\n                self.bigendian = 0\n                t = struct.unpack(\"<27f\", f)  # little-endian\n                hdrlen = isSpiderHeader(t)\n            if hdrlen == 0:\n                raise SyntaxError(\"not a valid Spider file\")\n        except struct.error:\n            raise SyntaxError(\"not a valid Spider file\")\n\n        h = (99,) + t  # add 1 value : spider header index starts at 1\n        iform = int(h[5])\n        if iform != 1:\n            raise SyntaxError(\"not a Spider 2D image\")\n\n        self._size = int(h[12]), int(h[2])  # size in pixels (width, height)\n        self.istack = int(h[24])\n        self.imgnumber = int(h[27])\n\n        if self.istack == 0 and self.imgnumber == 0:\n            # stk=0, img=0: a regular 2D image\n            offset = hdrlen\n            self._nimages = 1\n        elif self.istack > 0 and self.imgnumber == 0:\n            # stk>0, img=0: Opening the stack for the first time\n            self.imgbytes = int(h[12]) * int(h[2]) * 4\n            self.hdrlen = hdrlen\n            self._nimages = int(h[26])\n            # Point to the first image in the stack\n            offset = hdrlen * 2\n            self.imgnumber = 1\n        elif self.istack == 0 and self.imgnumber > 0:\n            # stk=0, img>0: an image within the stack\n            offset = hdrlen + self.stkoffset\n            self.istack = 2  # So Image knows it's still a stack\n        else:\n            raise SyntaxError(\"inconsistent stack header values\")\n\n        if self.bigendian:\n            self.rawmode = \"F;32BF\"\n        else:\n            self.rawmode = \"F;32F\"\n        self.mode = \"F\"\n\n        self.tile = [(\"raw\", (0, 0) + self.size, offset, (self.rawmode, 0, 1))]\n        self.__fp = self.fp  # FIXME: hack\n\n    @property\n    def n_frames(self):\n        return self._nimages\n\n    @property\n    def is_animated(self):\n        return self._nimages > 1\n\n    # 1st image index is zero (although SPIDER imgnumber starts at 1)\n    def tell(self):\n        if self.imgnumber < 1:\n            return 0\n        else:\n            return self.imgnumber - 1\n\n    def seek(self, frame):\n        if self.istack == 0:\n            raise EOFError(\"attempt to seek in a non-stack file\")\n        if not self._seek_check(frame):\n            return\n        self.stkoffset = self.hdrlen + frame * (self.hdrlen + self.imgbytes)\n        self.fp = self.__fp\n        self.fp.seek(self.stkoffset)\n        self._open()\n\n    # returns a byte image after rescaling to 0..255\n    def convert2byte(self, depth=255):\n        (minimum, maximum) = self.getextrema()\n        m = 1\n        if maximum != minimum:\n            m = depth / (maximum - minimum)\n        b = -m * minimum\n        return self.point(lambda i, m=m, b=b: i * m + b).convert(\"L\")\n\n    # returns a ImageTk.PhotoImage object, after rescaling to 0..255\n    def tkPhotoImage(self):\n        from PIL import ImageTk\n\n        return ImageTk.PhotoImage(self.convert2byte(), palette=256)\n\n    def _close__fp(self):\n        try:\n            if self.__fp != self.fp:\n                self.__fp.close()\n        except AttributeError:\n            pass\n        finally:\n            self.__fp = None\n\n\n# --------------------------------------------------------------------\n# Image series\n\n# given a list of filenames, return a list of images\ndef loadImageSeries(filelist=None):\n    \"\"\"create a list of :py:class:`~PIL.Image.Image` objects for use in a montage\"\"\"\n    if filelist is None or len(filelist) < 1:\n        return\n\n    imglist = []\n    for img in filelist:\n        if not os.path.exists(img):\n            print(\"unable to find %s\" % img)\n            continue\n        try:\n            im = Image.open(img).convert2byte()\n        except Exception:\n            if not isSpiderImage(img):\n                print(img + \" is not a Spider image file\")\n            continue\n        im.info[\"filename\"] = img\n        imglist.append(im)\n    return imglist\n\n\n# --------------------------------------------------------------------\n# For saving images in Spider format\n\n\ndef makeSpiderHeader(im):\n    nsam, nrow = im.size\n    lenbyt = nsam * 4  # There are labrec records in the header\n    labrec = 1024 / lenbyt\n    if 1024 % lenbyt != 0:\n        labrec += 1\n    labbyt = labrec * lenbyt\n    hdr = []\n    nvalues = int(labbyt / 4)\n    for i in range(nvalues):\n        hdr.append(0.0)\n\n    if len(hdr) < 23:\n        return []\n\n    # NB these are Fortran indices\n    hdr[1] = 1.0  # nslice (=1 for an image)\n    hdr[2] = float(nrow)  # number of rows per slice\n    hdr[5] = 1.0  # iform for 2D image\n    hdr[12] = float(nsam)  # number of pixels per line\n    hdr[13] = float(labrec)  # number of records in file header\n    hdr[22] = float(labbyt)  # total number of bytes in header\n    hdr[23] = float(lenbyt)  # record length in bytes\n\n    # adjust for Fortran indexing\n    hdr = hdr[1:]\n    hdr.append(0.0)\n    # pack binary data into a string\n    hdrstr = []\n    for v in hdr:\n        hdrstr.append(struct.pack(\"f\", v))\n    return hdrstr\n\n\ndef _save(im, fp, filename):\n    if im.mode[0] != \"F\":\n        im = im.convert(\"F\")\n\n    hdr = makeSpiderHeader(im)\n    if len(hdr) < 256:\n        raise IOError(\"Error creating Spider header\")\n\n    # write the SPIDER header\n    fp.writelines(hdr)\n\n    rawmode = \"F;32NF\"  # 32-bit native floating point\n    ImageFile._save(im, fp, [(\"raw\", (0, 0) + im.size, 0, (rawmode, 0, 1))])\n\n\ndef _save_spider(im, fp, filename):\n    # get the filename extension and register it with Image\n    ext = os.path.splitext(filename)[1]\n    Image.register_extension(SpiderImageFile.format, ext)\n    _save(im, fp, filename)\n\n\n# --------------------------------------------------------------------\n\n\nImage.register_open(SpiderImageFile.format, SpiderImageFile)\nImage.register_save(SpiderImageFile.format, _save_spider)\n\nif __name__ == \"__main__\":\n\n    if len(sys.argv) < 2:\n        print(\"Syntax: python SpiderImagePlugin.py [infile] [outfile]\")\n        sys.exit()\n\n    filename = sys.argv[1]\n    if not isSpiderImage(filename):\n        print(\"input image must be in Spider format\")\n        sys.exit()\n\n    im = Image.open(filename)\n    print(\"image: \" + str(im))\n    print(\"format: \" + str(im.format))\n    print(\"size: \" + str(im.size))\n    print(\"mode: \" + str(im.mode))\n    print(\"max, min: \", end=\" \")\n    print(im.getextrema())\n\n    if len(sys.argv) > 2:\n        outfile = sys.argv[2]\n\n        # perform some image operation\n        im = im.transpose(Image.FLIP_LEFT_RIGHT)\n        print(\n            \"saving a flipped version of %s as %s \"\n            % (os.path.basename(filename), outfile)\n        )\n        im.save(outfile, SpiderImageFile.format)\n",
            "new_file_content": "#\n# The Python Imaging Library.\n#\n# SPIDER image file handling\n#\n# History:\n# 2004-08-02    Created BB\n# 2006-03-02    added save method\n# 2006-03-13    added support for stack images\n#\n# Copyright (c) 2004 by Health Research Inc. (HRI) RENSSELAER, NY 12144.\n# Copyright (c) 2004 by William Baxter.\n# Copyright (c) 2004 by Secret Labs AB.\n# Copyright (c) 2004 by Fredrik Lundh.\n#\n\n##\n# Image plugin for the Spider image format.  This format is is used\n# by the SPIDER software, in processing image data from electron\n# microscopy and tomography.\n##\n\n#\n# SpiderImagePlugin.py\n#\n# The Spider image format is used by SPIDER software, in processing\n# image data from electron microscopy and tomography.\n#\n# Spider home page:\n# https://spider.wadsworth.org/spider_doc/spider/docs/spider.html\n#\n# Details about the Spider image format:\n# https://spider.wadsworth.org/spider_doc/spider/docs/image_doc.html\n#\n\nfrom __future__ import print_function\n\nimport os\nimport struct\nimport sys\n\nfrom PIL import Image, ImageFile\n\n\ndef isInt(f):\n    try:\n        i = int(f)\n        if f - i == 0:\n            return 1\n        else:\n            return 0\n    except (ValueError, OverflowError):\n        return 0\n\n\niforms = [1, 3, -11, -12, -21, -22]\n\n\n# There is no magic number to identify Spider files, so just check a\n# series of header locations to see if they have reasonable values.\n# Returns no. of bytes in the header, if it is a valid Spider header,\n# otherwise returns 0\n\n\ndef isSpiderHeader(t):\n    h = (99,) + t  # add 1 value so can use spider header index start=1\n    # header values 1,2,5,12,13,22,23 should be integers\n    for i in [1, 2, 5, 12, 13, 22, 23]:\n        if not isInt(h[i]):\n            return 0\n    # check iform\n    iform = int(h[5])\n    if iform not in iforms:\n        return 0\n    # check other header values\n    labrec = int(h[13])  # no. records in file header\n    labbyt = int(h[22])  # total no. of bytes in header\n    lenbyt = int(h[23])  # record length in bytes\n    if labbyt != (labrec * lenbyt):\n        return 0\n    # looks like a valid header\n    return labbyt\n\n\ndef isSpiderImage(filename):\n    with open(filename, \"rb\") as fp:\n        f = fp.read(92)  # read 23 * 4 bytes\n    t = struct.unpack(\">23f\", f)  # try big-endian first\n    hdrlen = isSpiderHeader(t)\n    if hdrlen == 0:\n        t = struct.unpack(\"<23f\", f)  # little-endian\n        hdrlen = isSpiderHeader(t)\n    return hdrlen\n\n\nclass SpiderImageFile(ImageFile.ImageFile):\n\n    format = \"SPIDER\"\n    format_description = \"Spider 2D image\"\n    _close_exclusive_fp_after_loading = False\n\n    def _open(self):\n        # check header\n        n = 27 * 4  # read 27 float values\n        f = self.fp.read(n)\n\n        try:\n            self.bigendian = 1\n            t = struct.unpack(\">27f\", f)  # try big-endian first\n            hdrlen = isSpiderHeader(t)\n            if hdrlen == 0:\n                self.bigendian = 0\n                t = struct.unpack(\"<27f\", f)  # little-endian\n                hdrlen = isSpiderHeader(t)\n            if hdrlen == 0:\n                raise SyntaxError(\"not a valid Spider file\")\n        except struct.error:\n            raise SyntaxError(\"not a valid Spider file\")\n\n        h = (99,) + t  # add 1 value : spider header index starts at 1\n        iform = int(h[5])\n        if iform != 1:\n            raise SyntaxError(\"not a Spider 2D image\")\n\n        self._size = int(h[12]), int(h[2])  # size in pixels (width, height)\n        self.istack = int(h[24])\n        self.imgnumber = int(h[27])\n\n        if self.istack == 0 and self.imgnumber == 0:\n            # stk=0, img=0: a regular 2D image\n            offset = hdrlen\n            self._nimages = 1\n        elif self.istack > 0 and self.imgnumber == 0:\n            # stk>0, img=0: Opening the stack for the first time\n            self.imgbytes = int(h[12]) * int(h[2]) * 4\n            self.hdrlen = hdrlen\n            self._nimages = int(h[26])\n            # Point to the first image in the stack\n            offset = hdrlen * 2\n            self.imgnumber = 1\n        elif self.istack == 0 and self.imgnumber > 0:\n            # stk=0, img>0: an image within the stack\n            offset = hdrlen + self.stkoffset\n            self.istack = 2  # So Image knows it's still a stack\n        else:\n            raise SyntaxError(\"inconsistent stack header values\")\n\n        if self.bigendian:\n            self.rawmode = \"F;32BF\"\n        else:\n            self.rawmode = \"F;32F\"\n        self.mode = \"F\"\n\n        self.tile = [(\"raw\", (0, 0) + self.size, offset, (self.rawmode, 0, 1))]\n        self.__fp = self.fp  # FIXME: hack\n\n    @property\n    def n_frames(self):\n        return self._nimages\n\n    @property\n    def is_animated(self):\n        return self._nimages > 1\n\n    # 1st image index is zero (although SPIDER imgnumber starts at 1)\n    def tell(self):\n        if self.imgnumber < 1:\n            return 0\n        else:\n            return self.imgnumber - 1\n\n    def seek(self, frame):\n        if self.istack == 0:\n            raise EOFError(\"attempt to seek in a non-stack file\")\n        if not self._seek_check(frame):\n            return\n        self.stkoffset = self.hdrlen + frame * (self.hdrlen + self.imgbytes)\n        self.fp = self.__fp\n        self.fp.seek(self.stkoffset)\n        self._open()\n\n    # returns a byte image after rescaling to 0..255\n    def convert2byte(self, depth=255):\n        (minimum, maximum) = self.getextrema()\n        m = 1\n        if maximum != minimum:\n            m = depth / (maximum - minimum)\n        b = -m * minimum\n        return self.point(lambda i, m=m, b=b: i * m + b).convert(\"L\")\n\n    # returns a ImageTk.PhotoImage object, after rescaling to 0..255\n    def tkPhotoImage(self):\n        from PIL import ImageTk\n\n        return ImageTk.PhotoImage(self.convert2byte(), palette=256)\n\n    def _close__fp(self):\n        try:\n            if self.__fp != self.fp:\n                self.__fp.close()\n        except AttributeError:\n            pass\n        finally:\n            self.__fp = None\n\n\n# --------------------------------------------------------------------\n# Image series\n\n# given a list of filenames, return a list of images\ndef loadImageSeries(filelist=None):\n    \"\"\"create a list of :py:class:`~PIL.Image.Image` objects for use in a montage\"\"\"\n    if filelist is None or len(filelist) < 1:\n        return\n\n    imglist = []\n    for img in filelist:\n        if not os.path.exists(img):\n            print(\"unable to find %s\" % img)\n            continue\n        try:\n            im = Image.open(img).convert2byte()\n        except Exception:\n            if not isSpiderImage(img):\n                print(img + \" is not a Spider image file\")\n            continue\n        im.info[\"filename\"] = img\n        imglist.append(im)\n    return imglist\n\n\n# --------------------------------------------------------------------\n# For saving images in Spider format\n\n\ndef makeSpiderHeader(im):\n    nsam, nrow = im.size\n    lenbyt = nsam * 4  # There are labrec records in the header\n    labrec = int(1024 / lenbyt)\n    if 1024 % lenbyt != 0:\n        labrec += 1\n    labbyt = labrec * lenbyt\n    hdr = []\n    nvalues = int(labbyt / 4)\n    for i in range(nvalues):\n        hdr.append(0.0)\n\n    if len(hdr) < 23:\n        return []\n\n    # NB these are Fortran indices\n    hdr[1] = 1.0  # nslice (=1 for an image)\n    hdr[2] = float(nrow)  # number of rows per slice\n    hdr[5] = 1.0  # iform for 2D image\n    hdr[12] = float(nsam)  # number of pixels per line\n    hdr[13] = float(labrec)  # number of records in file header\n    hdr[22] = float(labbyt)  # total number of bytes in header\n    hdr[23] = float(lenbyt)  # record length in bytes\n\n    # adjust for Fortran indexing\n    hdr = hdr[1:]\n    hdr.append(0.0)\n    # pack binary data into a string\n    hdrstr = []\n    for v in hdr:\n        hdrstr.append(struct.pack(\"f\", v))\n    return hdrstr\n\n\ndef _save(im, fp, filename):\n    if im.mode[0] != \"F\":\n        im = im.convert(\"F\")\n\n    hdr = makeSpiderHeader(im)\n    if len(hdr) < 256:\n        raise IOError(\"Error creating Spider header\")\n\n    # write the SPIDER header\n    fp.writelines(hdr)\n\n    rawmode = \"F;32NF\"  # 32-bit native floating point\n    ImageFile._save(im, fp, [(\"raw\", (0, 0) + im.size, 0, (rawmode, 0, 1))])\n\n\ndef _save_spider(im, fp, filename):\n    # get the filename extension and register it with Image\n    ext = os.path.splitext(filename)[1]\n    Image.register_extension(SpiderImageFile.format, ext)\n    _save(im, fp, filename)\n\n\n# --------------------------------------------------------------------\n\n\nImage.register_open(SpiderImageFile.format, SpiderImageFile)\nImage.register_save(SpiderImageFile.format, _save_spider)\n\nif __name__ == \"__main__\":\n\n    if len(sys.argv) < 2:\n        print(\"Syntax: python SpiderImagePlugin.py [infile] [outfile]\")\n        sys.exit()\n\n    filename = sys.argv[1]\n    if not isSpiderImage(filename):\n        print(\"input image must be in Spider format\")\n        sys.exit()\n\n    im = Image.open(filename)\n    print(\"image: \" + str(im))\n    print(\"format: \" + str(im.format))\n    print(\"size: \" + str(im.size))\n    print(\"mode: \" + str(im.mode))\n    print(\"max, min: \", end=\" \")\n    print(im.getextrema())\n\n    if len(sys.argv) > 2:\n        outfile = sys.argv[2]\n\n        # perform some image operation\n        im = im.transpose(Image.FLIP_LEFT_RIGHT)\n        print(\n            \"saving a flipped version of %s as %s \"\n            % (os.path.basename(filename), outfile)\n        )\n        im.save(outfile, SpiderImageFile.format)\n",
            "header": {
                "file": {
                    "path": "src/PIL/SpiderImagePlugin.py"
                },
                "misc_line": null
            },
            "index_line": {
                "old_commit_hash": "5663a5b53",
                "new_commit_hash": "f1cae4d9f",
                "mode": "100644"
            },
            "is_binary_file": false,
            "binary_line": null,
            "minus_file": {
                "path": "a/src/PIL/SpiderImagePlugin.py"
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            "plus_file": {
                "path": "b/src/PIL/SpiderImagePlugin.py"
            },
            "hunks": [
                {
                    "descriptor": {
                        "old_range": {
                            "start": 236,
                            "length": 7
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                        "new_range": {
                            "start": 236,
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                        },
                        "section": "def loadImageSeries(filelist=None):"
                    },
                    "line_group": {
                        "all_lines": [
                            {
                                "content": "def makeSpiderHeader(im):",
                                "type": "context"
                            },
                            {
                                "content": "    nsam, nrow = im.size",
                                "type": "context"
                            },
                            {
                                "content": "    lenbyt = nsam * 4  # There are labrec records in the header",
                                "type": "context"
                            },
                            {
                                "content": "    labrec = 1024 / lenbyt",
                                "type": "deleted"
                            },
                            {
                                "content": "    labrec = int(1024 / lenbyt)",
                                "type": "added"
                            },
                            {
                                "content": "    if 1024 % lenbyt != 0:",
                                "type": "context"
                            },
                            {
                                "content": "        labrec += 1",
                                "type": "context"
                            },
                            {
                                "content": "    labbyt = labrec * lenbyt",
                                "type": "context"
                            },
                            {
                                "content": "",
                                "type": "context"
                            }
                        ]
                    },
                    "modified_entities": [
                        {
                            "file_name": "src/PIL/SpiderImagePlugin.py",
                            "type": "function",
                            "name": "makeSpiderHeader",
                            "content": "def makeSpiderHeader(im):\n    nsam, nrow = im.size\n    lenbyt = nsam * 4  # There are labrec records in the header\n    labrec = 1024 / lenbyt\n    if 1024 % lenbyt != 0:\n        labrec += 1\n    labbyt = labrec * lenbyt\n    hdr = []\n    nvalues = int(labbyt / 4)\n    for i in range(nvalues):\n        hdr.append(0.0)\n\n    if len(hdr) < 23:\n        return []\n\n    # NB these are Fortran indices\n    hdr[1] = 1.0  # nslice (=1 for an image)\n    hdr[2] = float(nrow)  # number of rows per slice\n    hdr[5] = 1.0  # iform for 2D image\n    hdr[12] = float(nsam)  # number of pixels per line\n    hdr[13] = float(labrec)  # number of records in file header\n    hdr[22] = float(labbyt)  # total number of bytes in header\n    hdr[23] = float(lenbyt)  # record length in bytes\n\n    # adjust for Fortran indexing\n    hdr = hdr[1:]\n    hdr.append(0.0)\n    # pack binary data into a string\n    hdrstr = []\n    for v in hdr:\n        hdrstr.append(struct.pack(\"f\", v))\n    return hdrstr",
                            "ast_type_str": "FunctionDef",
                            "start_lineno": 236,
                            "end_lineno": 267,
                            "parent": null
                        }
                    ],
                    "added_entities": [],
                    "deleted_entities": []
                }
            ]
        }
    ],
    "old_commit_hash": "575a616bb594b974cdc71a87b128b522560a3339^",
    "new_commit_hash": "575a616bb594b974cdc71a87b128b522560a3339",
    "commit_message": "Round Spider record count (#4094)\n\nRound Spider record count",
    "commit_date": "2019-09-28T10:41:51+03:00",
    "metadata": {}
}
{
    "repo_name": "pillow",
    "new_commit_hash": "575a616bb594b974cdc71a87b128b522560a3339",
    "test_file_codes": [
        "import tempfile\nfrom io import BytesIO\n\nfrom PIL import Image, ImageSequence, SpiderImagePlugin\n\nfrom .helper import PillowTestCase, hopper\n\nTEST_FILE = \"Tests/images/hopper.spider\"\n\n\nclass TestImageSpider(PillowTestCase):\n    def test_sanity(self):\n        im = Image.open(TEST_FILE)\n        im.load()\n        self.assertEqual(im.mode, \"F\")\n        self.assertEqual(im.size, (128, 128))\n        self.assertEqual(im.format, \"SPIDER\")\n\n    def test_unclosed_file(self):\n        def open():\n            im = Image.open(TEST_FILE)\n            im.load()\n\n        self.assert_warning(None, open)\n\n    def test_save(self):\n        # Arrange\n        temp = self.tempfile(\"temp.spider\")\n        im = hopper()\n\n        # Act\n        im.save(temp, \"SPIDER\")\n\n        # Assert\n        im2 = Image.open(temp)\n        self.assertEqual(im2.mode, \"F\")\n        self.assertEqual(im2.size, (128, 128))\n        self.assertEqual(im2.format, \"SPIDER\")\n\n    def test_tempfile(self):\n        # Arrange\n        im = hopper()\n\n        # Act\n        with tempfile.TemporaryFile() as fp:\n            im.save(fp, \"SPIDER\")\n\n            # Assert\n            fp.seek(0)\n            reloaded = Image.open(fp)\n            self.assertEqual(reloaded.mode, \"F\")\n            self.assertEqual(reloaded.size, (128, 128))\n            self.assertEqual(reloaded.format, \"SPIDER\")\n\n    def test_isSpiderImage(self):\n        self.assertTrue(SpiderImagePlugin.isSpiderImage(TEST_FILE))\n\n    def test_tell(self):\n        # Arrange\n        im = Image.open(TEST_FILE)\n\n        # Act\n        index = im.tell()\n\n        # Assert\n        self.assertEqual(index, 0)\n\n    def test_n_frames(self):\n        im = Image.open(TEST_FILE)\n        self.assertEqual(im.n_frames, 1)\n        self.assertFalse(im.is_animated)\n\n    def test_loadImageSeries(self):\n        # Arrange\n        not_spider_file = \"Tests/images/hopper.ppm\"\n        file_list = [TEST_FILE, not_spider_file, \"path/not_found.ext\"]\n\n        # Act\n        img_list = SpiderImagePlugin.loadImageSeries(file_list)\n\n        # Assert\n        self.assertEqual(len(img_list), 1)\n        self.assertIsInstance(img_list[0], Image.Image)\n        self.assertEqual(img_list[0].size, (128, 128))\n\n    def test_loadImageSeries_no_input(self):\n        # Arrange\n        file_list = None\n\n        # Act\n        img_list = SpiderImagePlugin.loadImageSeries(file_list)\n\n        # Assert\n        self.assertIsNone(img_list)\n\n    def test_isInt_not_a_number(self):\n        # Arrange\n        not_a_number = \"a\"\n\n        # Act\n        ret = SpiderImagePlugin.isInt(not_a_number)\n\n        # Assert\n        self.assertEqual(ret, 0)\n\n    def test_invalid_file(self):\n        invalid_file = \"Tests/images/invalid.spider\"\n\n        self.assertRaises(IOError, Image.open, invalid_file)\n\n    def test_nonstack_file(self):\n        im = Image.open(TEST_FILE)\n\n        self.assertRaises(EOFError, im.seek, 0)\n\n    def test_nonstack_dos(self):\n        im = Image.open(TEST_FILE)\n        for i, frame in enumerate(ImageSequence.Iterator(im)):\n            if i > 1:\n                self.fail(\"Non-stack DOS file test failed\")\n\n    # for issue #4093\n    def test_odd_size(self):\n        data = BytesIO()\n        width = 100\n        im = Image.new(\"F\", (width, 64))\n        im.save(data, format=\"SPIDER\")\n\n        data.seek(0)\n        im2 = Image.open(data)\n        self.assert_image_equal(im, im2)\n"
    ],
    "test_file_names": [
        "test_1.py"
    ],
    "setup_res_code": 0,
    "setup_res_stdout": "Starting Pillow installation attempts...\nVerifying Pillow installation...\n✅ Pillow installation successful!\nSuccessfully installed Pillow\n",
    "setup_res_stderr": "Using CPython 3.9.21\nCreating virtual environment at: .venv\nActivate with: source .venv/bin/activate\nResolved 12 packages in 15ms\nInstalled 12 packages in 126ms\n + coverage==7.6.10\n + exceptiongroup==1.2.2\n + iniconfig==2.0.0\n + packaging==24.2\n + pluggy==1.5.0\n + pyqt5==5.15.11\n + pyqt5-qt5==5.15.16\n + pyqt5-sip==12.16.1\n + pytest==8.3.4\n + pytest-cov==6.0.0\n + setuptools==75.8.0\n + tomli==2.2.1\nResolved 1 package in 848ms\nPrepared 1 package in 32.01s\nInstalled 1 package in 1ms\n + pillow==6.2.0.dev0 (from file:///home/gcpuser/buckets/local_repoeval_bucket/repos/pillow_575a616bb594b974cdc71a87b128b522560a3339)\n",
    "new_commit_res_code": 0,
    "new_commit_res_stdout": "============================= test session starts ==============================\nplatform linux -- Python 3.9.21, pytest-8.3.4, pluggy-1.5.0\nrootdir: /home/gcpuser/buckets/local_repoeval_bucket/repos/pillow_575a616bb594b974cdc71a87b128b522560a3339\nconfigfile: setup.cfg\nplugins: cov-6.0.0\ncollected 14 items\n\nr2e_tests/test_1.py ..............                                       [100%]\n\n==================================== PASSES ====================================\n_____________________ TestImageSpider.test_loadImageSeries _____________________\n----------------------------- Captured stdout call -----------------------------\nTests/images/hopper.ppm is not a Spider image file\nunable to find path/not_found.ext\n=========================== short test summary info ============================\nPASSED r2e_tests/test_1.py::TestImageSpider::test_invalid_file\nPASSED r2e_tests/test_1.py::TestImageSpider::test_isInt_not_a_number\nPASSED r2e_tests/test_1.py::TestImageSpider::test_isSpiderImage\nPASSED r2e_tests/test_1.py::TestImageSpider::test_loadImageSeries\nPASSED r2e_tests/test_1.py::TestImageSpider::test_loadImageSeries_no_input\nPASSED r2e_tests/test_1.py::TestImageSpider::test_n_frames\nPASSED r2e_tests/test_1.py::TestImageSpider::test_nonstack_dos\nPASSED r2e_tests/test_1.py::TestImageSpider::test_nonstack_file\nPASSED r2e_tests/test_1.py::TestImageSpider::test_odd_size\nPASSED r2e_tests/test_1.py::TestImageSpider::test_sanity\nPASSED r2e_tests/test_1.py::TestImageSpider::test_save\nPASSED r2e_tests/test_1.py::TestImageSpider::test_tell\nPASSED r2e_tests/test_1.py::TestImageSpider::test_tempfile\nPASSED r2e_tests/test_1.py::TestImageSpider::test_unclosed_file\n============================== 14 passed in 0.24s ==============================\n",
    "new_commit_res_stderr": "",
    "old_commit_res_code": 1,
    "old_commit_res_stdout": "============================= test session starts ==============================\nplatform linux -- Python 3.9.21, pytest-8.3.4, pluggy-1.5.0\nrootdir: /home/gcpuser/buckets/local_repoeval_bucket/repos/pillow_575a616bb594b974cdc71a87b128b522560a3339\nconfigfile: setup.cfg\nplugins: cov-6.0.0\ncollected 14 items\n\nr2e_tests/test_1.py ........F.....                                       [100%]\n\n=================================== FAILURES ===================================\n________________________ TestImageSpider.test_odd_size _________________________\n\nself = <r2e_tests.test_1.TestImageSpider testMethod=test_odd_size>\n\n    def test_odd_size(self):\n        data = BytesIO()\n        width = 100\n        im = Image.new(\"F\", (width, 64))\n        im.save(data, format=\"SPIDER\")\n    \n        data.seek(0)\n>       im2 = Image.open(data)\n\nr2e_tests/test_1.py:130: \n_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ \n\nfp = <_io.BytesIO object at 0x715debd79090>, mode = 'r'\n\n    def open(fp, mode=\"r\"):\n        \"\"\"\n        Opens and identifies the given image file.\n    \n        This is a lazy operation; this function identifies the file, but\n        the file remains open and the actual image data is not read from\n        the file until you try to process the data (or call the\n        :py:meth:`~PIL.Image.Image.load` method).  See\n        :py:func:`~PIL.Image.new`. See :ref:`file-handling`.\n    \n        :param fp: A filename (string), pathlib.Path object or a file object.\n           The file object must implement :py:meth:`~file.read`,\n           :py:meth:`~file.seek`, and :py:meth:`~file.tell` methods,\n           and be opened in binary mode.\n        :param mode: The mode.  If given, this argument must be \"r\".\n        :returns: An :py:class:`~PIL.Image.Image` object.\n        :exception IOError: If the file cannot be found, or the image cannot be\n           opened and identified.\n        \"\"\"\n    \n        if mode != \"r\":\n            raise ValueError(\"bad mode %r\" % mode)\n    \n        exclusive_fp = False\n        filename = \"\"\n        if HAS_PATHLIB and isinstance(fp, Path):\n            filename = str(fp.resolve())\n        elif isPath(fp):\n            filename = fp\n    \n        if filename:\n            fp = builtins.open(filename, \"rb\")\n            exclusive_fp = True\n    \n        try:\n            fp.seek(0)\n        except (AttributeError, io.UnsupportedOperation):\n            fp = io.BytesIO(fp.read())\n            exclusive_fp = True\n    \n        prefix = fp.read(16)\n    \n        preinit()\n    \n        accept_warnings = []\n    \n        def _open_core(fp, filename, prefix):\n            for i in ID:\n                try:\n                    factory, accept = OPEN[i]\n                    result = not accept or accept(prefix)\n                    if type(result) in [str, bytes]:\n                        accept_warnings.append(result)\n                    elif result:\n                        fp.seek(0)\n                        im = factory(fp, filename)\n                        _decompression_bomb_check(im.size)\n                        return im\n                except (SyntaxError, IndexError, TypeError, struct.error):\n                    # Leave disabled by default, spams the logs with image\n                    # opening failures that are entirely expected.\n                    # logger.debug(\"\", exc_info=True)\n                    continue\n                except BaseException:\n                    if exclusive_fp:\n                        fp.close()\n                    raise\n            return None\n    \n        im = _open_core(fp, filename, prefix)\n    \n        if im is None:\n            if init():\n                im = _open_core(fp, filename, prefix)\n    \n        if im:\n            im._exclusive_fp = exclusive_fp\n            return im\n    \n        if exclusive_fp:\n            fp.close()\n        for message in accept_warnings:\n            warnings.warn(message)\n>       raise IOError(\"cannot identify image file %r\" % (filename if filename else fp))\nE       OSError: cannot identify image file <_io.BytesIO object at 0x715debd79090>\n\nsrc/PIL/Image.py:2818: OSError\n==================================== PASSES ====================================\n_____________________ TestImageSpider.test_loadImageSeries _____________________\n----------------------------- Captured stdout call -----------------------------\nTests/images/hopper.ppm is not a Spider image file\nunable to find path/not_found.ext\n=========================== short test summary info ============================\nPASSED r2e_tests/test_1.py::TestImageSpider::test_invalid_file\nPASSED r2e_tests/test_1.py::TestImageSpider::test_isInt_not_a_number\nPASSED r2e_tests/test_1.py::TestImageSpider::test_isSpiderImage\nPASSED r2e_tests/test_1.py::TestImageSpider::test_loadImageSeries\nPASSED r2e_tests/test_1.py::TestImageSpider::test_loadImageSeries_no_input\nPASSED r2e_tests/test_1.py::TestImageSpider::test_n_frames\nPASSED r2e_tests/test_1.py::TestImageSpider::test_nonstack_dos\nPASSED r2e_tests/test_1.py::TestImageSpider::test_nonstack_file\nPASSED r2e_tests/test_1.py::TestImageSpider::test_sanity\nPASSED r2e_tests/test_1.py::TestImageSpider::test_save\nPASSED r2e_tests/test_1.py::TestImageSpider::test_tell\nPASSED r2e_tests/test_1.py::TestImageSpider::test_tempfile\nPASSED r2e_tests/test_1.py::TestImageSpider::test_unclosed_file\nFAILED r2e_tests/test_1.py::TestImageSpider::test_odd_size - OSError: cannot ...\n========================= 1 failed, 13 passed in 0.22s =========================\n",
    "old_commit_res_stderr": ""
}
Tests/test_file_spider.py src/PIL/SpiderImagePlugin.py
We are currently solving the following issue within our repository. Here is the issue text:
--- BEGIN ISSUE ---
[ISSUE]
**Title:** OSError Raised When Opening SPIDER Image with Certain Dimensions

**Description:**
When saving and reopening a SPIDER image with specific dimensions, an error occurs indicating that the image file cannot be identified.

**Example Code:**
```python
from io import BytesIO
from PIL import Image

width = 100
im = Image.new('F', (width, 64))
data = BytesIO()
im.save(data, format='SPIDER')

data.seek(0)
im2 = Image.open(data)
```

**Expected Behavior:**
The image should be saved and reopened successfully without any errors.

**Actual Behavior:**
An `OSError` is raised with the message:
```
OSError: cannot identify image file <_io.BytesIO object at 0x...>
```
[/ISSUE]
--- END ISSUE ---

Below are some code segments, each from a relevant file. One or more of these files may contain bugs.

--- BEGIN FILE ---
```
### src/PIL/SpiderImagePlugin.py
#
# The Python Imaging Library.
#
# SPIDER image file handling
#
# History:
# 2004-08-02    Created BB
# 2006-03-02    added save method
# 2006-03-13    added support for stack images
#
# Copyright (c) 2004 by Health Research Inc. (HRI) RENSSELAER, NY 12144.
# Copyright (c) 2004 by William Baxter.
# Copyright (c) 2004 by Secret Labs AB.
# Copyright (c) 2004 by Fredrik Lundh.
#

##
# Image plugin for the Spider image format.  This format is is used
# by the SPIDER software, in processing image data from electron
# microscopy and tomography.
##

#
# SpiderImagePlugin.py
#
# The Spider image format is used by SPIDER software, in processing
# image data from electron microscopy and tomography.
#
# Spider home page:
# https://spider.wadsworth.org/spider_doc/spider/docs/spider.html
#
# Details about the Spider image format:
# https://spider.wadsworth.org/spider_doc/spider/docs/image_doc.html
#

from __future__ import print_function

import os
import struct
import sys

from PIL import Image, ImageFile


def isInt(f):
    try:
        i = int(f)
        if f - i == 0:
            return 1
        else:
            return 0
    except (ValueError, OverflowError):
        return 0


iforms = [1, 3, -11, -12, -21, -22]


# There is no magic number to identify Spider files, so just check a
# series of header locations to see if they have reasonable values.
# Returns no. of bytes in the header, if it is a valid Spider header,
# otherwise returns 0


def isSpiderHeader(t):
    h = (99,) + t  # add 1 value so can use spider header index start=1
    # header values 1,2,5,12,13,22,23 should be integers
    for i in [1, 2, 5, 12, 13, 22, 23]:
        if not isInt(h[i]):
            return 0
    # check iform
    iform = int(h[5])
    if iform not in iforms:
        return 0
    # check other header values
    labrec = int(h[13])  # no. records in file header
    labbyt = int(h[22])  # total no. of bytes in header
    lenbyt = int(h[23])  # record length in bytes
    if labbyt != (labrec * lenbyt):
        return 0
    # looks like a valid header
    return labbyt


def isSpiderImage(filename):
    with open(filename, "rb") as fp:
        f = fp.read(92)  # read 23 * 4 bytes
    t = struct.unpack(">23f", f)  # try big-endian first
    hdrlen = isSpiderHeader(t)
    if hdrlen == 0:
        t = struct.unpack("<23f", f)  # little-endian
        hdrlen = isSpiderHeader(t)
    return hdrlen


class SpiderImageFile(ImageFile.ImageFile):

    format = "SPIDER"
    format_description = "Spider 2D image"
    _close_exclusive_fp_after_loading = False

    def _open(self):
        # check header
        n = 27 * 4  # read 27 float values
        f = self.fp.read(n)

        try:
            self.bigendian = 1
            t = struct.unpack(">27f", f)  # try big-endian first
            hdrlen = isSpiderHeader(t)
            if hdrlen == 0:
                self.bigendian = 0
                t = struct.unpack("<27f", f)  # little-endian
                hdrlen = isSpiderHeader(t)
            if hdrlen == 0:
                raise SyntaxError("not a valid Spider file")
        except struct.error:
            raise SyntaxError("not a valid Spider file")

        h = (99,) + t  # add 1 value : spider header index starts at 1
        iform = int(h[5])
        if iform != 1:
            raise SyntaxError("not a Spider 2D image")

        self._size = int(h[12]), int(h[2])  # size in pixels (width, height)
        self.istack = int(h[24])
        self.imgnumber = int(h[27])

        if self.istack == 0 and self.imgnumber == 0:
            # stk=0, img=0: a regular 2D image
            offset = hdrlen
            self._nimages = 1
        elif self.istack > 0 and self.imgnumber == 0:
            # stk>0, img=0: Opening the stack for the first time
            self.imgbytes = int(h[12]) * int(h[2]) * 4
            self.hdrlen = hdrlen
            self._nimages = int(h[26])
            # Point to the first image in the stack
            offset = hdrlen * 2
            self.imgnumber = 1
        elif self.istack == 0 and self.imgnumber > 0:
            # stk=0, img>0: an image within the stack
            offset = hdrlen + self.stkoffset
            self.istack = 2  # So Image knows it's still a stack
        else:
            raise SyntaxError("inconsistent stack header values")

        if self.bigendian:
            self.rawmode = "F;32BF"
        else:
            self.rawmode = "F;32F"
        self.mode = "F"

        self.tile = [("raw", (0, 0) + self.size, offset, (self.rawmode, 0, 1))]
        self.__fp = self.fp  # FIXME: hack

    @property
    def n_frames(self):
        return self._nimages

    @property
    def is_animated(self):
        return self._nimages > 1

    # 1st image index is zero (although SPIDER imgnumber starts at 1)
    def tell(self):
        if self.imgnumber < 1:
            return 0
        else:
            return self.imgnumber - 1

    def seek(self, frame):
        if self.istack == 0:
            raise EOFError("attempt to seek in a non-stack file")
        if not self._seek_check(frame):
            return
        self.stkoffset = self.hdrlen + frame * (self.hdrlen + self.imgbytes)
        self.fp = self.__fp
        self.fp.seek(self.stkoffset)
        self._open()

    # returns a byte image after rescaling to 0..255
    def convert2byte(self, depth=255):
        (minimum, maximum) = self.getextrema()
        m = 1
        if maximum != minimum:
            m = depth / (maximum - minimum)
        b = -m * minimum
        return self.point(lambda i, m=m, b=b: i * m + b).convert("L")

    # returns a ImageTk.PhotoImage object, after rescaling to 0..255
    def tkPhotoImage(self):
        from PIL import ImageTk

        return ImageTk.PhotoImage(self.convert2byte(), palette=256)

    def _close__fp(self):
        try:
            if self.__fp != self.fp:
                self.__fp.close()
        except AttributeError:
            pass
        finally:
            self.__fp = None


# --------------------------------------------------------------------
# Image series

# given a list of filenames, return a list of images
def loadImageSeries(filelist=None):
    """create a list of :py:class:`~PIL.Image.Image` objects for use in a montage"""
    if filelist is None or len(filelist) < 1:
        return

    imglist = []
    for img in filelist:
        if not os.path.exists(img):
            print("unable to find %s" % img)
            continue
        try:
            im = Image.open(img).convert2byte()
        except Exception:
            if not isSpiderImage(img):
                print(img + " is not a Spider image file")
            continue
        im.info["filename"] = img
        imglist.append(im)
    return imglist


# --------------------------------------------------------------------
# For saving images in Spider format


def makeSpiderHeader(im):
    nsam, nrow = im.size
    lenbyt = nsam * 4  # There are labrec records in the header
    labrec = 1024 / lenbyt
    if 1024 % lenbyt != 0:
        labrec += 1
    labbyt = labrec * lenbyt
    hdr = []
    nvalues = int(labbyt / 4)
    for i in range(nvalues):
        hdr.append(0.0)

    if len(hdr) < 23:
        return []

    # NB these are Fortran indices
    hdr[1] = 1.0  # nslice (=1 for an image)
    hdr[2] = float(nrow)  # number of rows per slice
    hdr[5] = 1.0  # iform for 2D image
    hdr[12] = float(nsam)  # number of pixels per line
    hdr[13] = float(labrec)  # number of records in file header
    hdr[22] = float(labbyt)  # total number of bytes in header
    hdr[23] = float(lenbyt)  # record length in bytes

    # adjust for Fortran indexing
    hdr = hdr[1:]
    hdr.append(0.0)
    # pack binary data into a string
    hdrstr = []
    for v in hdr:
        hdrstr.append(struct.pack("f", v))
    return hdrstr


def _save(im, fp, filename):
    if im.mode[0] != "F":
        im = im.convert("F")

    hdr = makeSpiderHeader(im)
    if len(hdr) < 256:
        raise IOError("Error creating Spider header")

    # write the SPIDER header
    fp.writelines(hdr)

    rawmode = "F;32NF"  # 32-bit native floating point
    ImageFile._save(im, fp, [("raw", (0, 0) + im.size, 0, (rawmode, 0, 1))])


def _save_spider(im, fp, filename):
    # get the filename extension and register it with Image
    ext = os.path.splitext(filename)[1]
    Image.register_extension(SpiderImageFile.format, ext)
    _save(im, fp, filename)


# --------------------------------------------------------------------


Image.register_open(SpiderImageFile.format, SpiderImageFile)
Image.register_save(SpiderImageFile.format, _save_spider)

if __name__ == "__main__":

    if len(sys.argv) < 2:
        print("Syntax: python SpiderImagePlugin.py [infile] [outfile]")
        sys.exit()

    filename = sys.argv[1]
    if not isSpiderImage(filename):
        print("input image must be in Spider format")
        sys.exit()

    im = Image.open(filename)
    print("image: " + str(im))
    print("format: " + str(im.format))
    print("size: " + str(im.size))
    print("mode: " + str(im.mode))
    print("max, min: ", end=" ")
    print(im.getextrema())

    if len(sys.argv) > 2:
        outfile = sys.argv[2]

        # perform some image operation
        im = im.transpose(Image.FLIP_LEFT_RIGHT)
        print(
            "saving a flipped version of %s as %s "
            % (os.path.basename(filename), outfile)
        )
        im.save(outfile, SpiderImageFile.format)

```
--- END FILE ---

Please first localize the bug based on the issue statement, and then generate *SEARCH/REPLACE* edits to fix the issue.

Every *SEARCH/REPLACE* edit must use this format:
1. The file path
2. The start of search block: <<<<<<< SEARCH
3. A contiguous chunk of lines to search for in the existing source code
4. The dividing line: =======
5. The lines to replace into the source code
6. The end of the replace block: >>>>>>> REPLACE

Here is an example:

```python
### mathweb/flask/app.py
<<<<<<< SEARCH
from flask import Flask
=======
import math
from flask import Flask
>>>>>>> REPLACE
```
</solution>

Please note that the *SEARCH/REPLACE* edit REQUIRES PROPER INDENTATION. If you would like to add the line '        print(x)', you must fully write that out, with all those spaces before the code!
Wrap each *SEARCH/REPLACE* edit in a code block as shown in the example above. If you have multiple *SEARCH/REPLACE* edits, use a separate code block for each one.
[ISSUE]
**Title:** OSError Raised When Opening SPIDER Image with Certain Dimensions

**Description:**
When saving and reopening a SPIDER image with specific dimensions, an error occurs indicating that the image file cannot be identified.

**Example Code:**
```python
from io import BytesIO
from PIL import Image

width = 100
im = Image.new('F', (width, 64))
data = BytesIO()
im.save(data, format='SPIDER')

data.seek(0)
im2 = Image.open(data)
```

**Expected Behavior:**
The image should be saved and reopened successfully without any errors.

**Actual Behavior:**
An `OSError` is raised with the message:
```
OSError: cannot identify image file <_io.BytesIO object at 0x...>
```
[/ISSUE]
{
    "TestImageSpider.test_invalid_file": "PASSED",
    "TestImageSpider.test_isInt_not_a_number": "PASSED",
    "TestImageSpider.test_isSpiderImage": "PASSED",
    "TestImageSpider.test_loadImageSeries": "PASSED",
    "TestImageSpider.test_loadImageSeries_no_input": "PASSED",
    "TestImageSpider.test_n_frames": "PASSED",
    "TestImageSpider.test_nonstack_dos": "PASSED",
    "TestImageSpider.test_nonstack_file": "PASSED",
    "TestImageSpider.test_odd_size": "PASSED",
    "TestImageSpider.test_sanity": "PASSED",
    "TestImageSpider.test_save": "PASSED",
    "TestImageSpider.test_tell": "PASSED",
    "TestImageSpider.test_tempfile": "PASSED",
    "TestImageSpider.test_unclosed_file": "PASSED"
}
diff --git a/src/PIL/SpiderImagePlugin.py b/src/PIL/SpiderImagePlugin.py
index 5663a5b53..f1cae4d9f 100644
--- a/src/PIL/SpiderImagePlugin.py
+++ b/src/PIL/SpiderImagePlugin.py
@@ -236,7 +236,7 @@ def loadImageSeries(filelist=None):
 def makeSpiderHeader(im):
     nsam, nrow = im.size
     lenbyt = nsam * 4  # There are labrec records in the header
-    labrec = 1024 / lenbyt
+    labrec = int(1024 / lenbyt)
     if 1024 % lenbyt != 0:
         labrec += 1
     labbyt = labrec * lenbyt
 

{"src/PIL/SpiderImagePlugin.py": "#\n# The Python Imaging Library.\n#\n# SPIDER image file handling\n#\n# History:\n# 2004-08-02    Created BB\n# 2006-03-02    added save method\n# 2006-03-13    added support for stack images\n#\n# Copyright (c) 2004 by Health Research Inc. (HRI) RENSSELAER, NY 12144.\n# Copyright (c) 2004 by William Baxter.\n# Copyright (c) 2004 by Secret Labs AB.\n# Copyright (c) 2004 by Fredrik Lundh.\n#\n\n##\n# Image plugin for the Spider image format.  This format is is used\n# by the SPIDER software, in processing image data from electron\n# microscopy and tomography.\n##\n\n#\n# SpiderImagePlugin.py\n#\n# The Spider image format is used by SPIDER software, in processing\n# image data from electron microscopy and tomography.\n#\n# Spider home page:\n# https://spider.wadsworth.org/spider_doc/spider/docs/spider.html\n#\n# Details about the Spider image format:\n# https://spider.wadsworth.org/spider_doc/spider/docs/image_doc.html\n#\n\nfrom __future__ import print_function\n\nimport os\nimport struct\nimport sys\n\nfrom PIL import Image, ImageFile\n\n\ndef isInt(f):\n    try:\n        i = int(f)\n        if f - i == 0:\n            return 1\n        else:\n            return 0\n    except (ValueError, OverflowError):\n        return 0\n\n\niforms = [1, 3, -11, -12, -21, -22]\n\n\n# There is no magic number to identify Spider files, so just check a\n# series of header locations to see if they have reasonable values.\n# Returns no. of bytes in the header, if it is a valid Spider header,\n# otherwise returns 0\n\n\ndef isSpiderHeader(t):\n    h = (99,) + t  # add 1 value so can use spider header index start=1\n    # header values 1,2,5,12,13,22,23 should be integers\n    for i in [1, 2, 5, 12, 13, 22, 23]:\n        if not isInt(h[i]):\n            return 0\n    # check iform\n    iform = int(h[5])\n    if iform not in iforms:\n        return 0\n    # check other header values\n    labrec = int(h[13])  # no. records in file header\n    labbyt = int(h[22])  # total no. of bytes in header\n    lenbyt = int(h[23])  # record length in bytes\n    if labbyt != (labrec * lenbyt):\n        return 0\n    # looks like a valid header\n    return labbyt\n\n\ndef isSpiderImage(filename):\n    with open(filename, \"rb\") as fp:\n        f = fp.read(92)  # read 23 * 4 bytes\n    t = struct.unpack(\">23f\", f)  # try big-endian first\n    hdrlen = isSpiderHeader(t)\n    if hdrlen == 0:\n        t = struct.unpack(\"<23f\", f)  # little-endian\n        hdrlen = isSpiderHeader(t)\n    return hdrlen\n\n\nclass SpiderImageFile(ImageFile.ImageFile):\n\n    format = \"SPIDER\"\n    format_description = \"Spider 2D image\"\n    _close_exclusive_fp_after_loading = False\n\n    def _open(self):\n        # check header\n        n = 27 * 4  # read 27 float values\n        f = self.fp.read(n)\n\n        try:\n            self.bigendian = 1\n            t = struct.unpack(\">27f\", f)  # try big-endian first\n            hdrlen = isSpiderHeader(t)\n            if hdrlen == 0:\n                self.bigendian = 0\n                t = struct.unpack(\"<27f\", f)  # little-endian\n                hdrlen = isSpiderHeader(t)\n            if hdrlen == 0:\n                raise SyntaxError(\"not a valid Spider file\")\n        except struct.error:\n            raise SyntaxError(\"not a valid Spider file\")\n\n        h = (99,) + t  # add 1 value : spider header index starts at 1\n        iform = int(h[5])\n        if iform != 1:\n            raise SyntaxError(\"not a Spider 2D image\")\n\n        self._size = int(h[12]), int(h[2])  # size in pixels (width, height)\n        self.istack = int(h[24])\n        self.imgnumber = int(h[27])\n\n        if self.istack == 0 and self.imgnumber == 0:\n            # stk=0, img=0: a regular 2D image\n            offset = hdrlen\n            self._nimages = 1\n        elif self.istack > 0 and self.imgnumber == 0:\n            # stk>0, img=0: Opening the stack for the first time\n            self.imgbytes = int(h[12]) * int(h[2]) * 4\n            self.hdrlen = hdrlen\n            self._nimages = int(h[26])\n            # Point to the first image in the stack\n            offset = hdrlen * 2\n            self.imgnumber = 1\n        elif self.istack == 0 and self.imgnumber > 0:\n            # stk=0, img>0: an image within the stack\n            offset = hdrlen + self.stkoffset\n            self.istack = 2  # So Image knows it's still a stack\n        else:\n            raise SyntaxError(\"inconsistent stack header values\")\n\n        if self.bigendian:\n            self.rawmode = \"F;32BF\"\n        else:\n            self.rawmode = \"F;32F\"\n        self.mode = \"F\"\n\n        self.tile = [(\"raw\", (0, 0) + self.size, offset, (self.rawmode, 0, 1))]\n        self.__fp = self.fp  # FIXME: hack\n\n    @property\n    def n_frames(self):\n        return self._nimages\n\n    @property\n    def is_animated(self):\n        return self._nimages > 1\n\n    # 1st image index is zero (although SPIDER imgnumber starts at 1)\n    def tell(self):\n        if self.imgnumber < 1:\n            return 0\n        else:\n            return self.imgnumber - 1\n\n    def seek(self, frame):\n        if self.istack == 0:\n            raise EOFError(\"attempt to seek in a non-stack file\")\n        if not self._seek_check(frame):\n            return\n        self.stkoffset = self.hdrlen + frame * (self.hdrlen + self.imgbytes)\n        self.fp = self.__fp\n        self.fp.seek(self.stkoffset)\n        self._open()\n\n    # returns a byte image after rescaling to 0..255\n    def convert2byte(self, depth=255):\n        (minimum, maximum) = self.getextrema()\n        m = 1\n        if maximum != minimum:\n            m = depth / (maximum - minimum)\n        b = -m * minimum\n        return self.point(lambda i, m=m, b=b: i * m + b).convert(\"L\")\n\n    # returns a ImageTk.PhotoImage object, after rescaling to 0..255\n    def tkPhotoImage(self):\n        from PIL import ImageTk\n\n        return ImageTk.PhotoImage(self.convert2byte(), palette=256)\n\n    def _close__fp(self):\n        try:\n            if self.__fp != self.fp:\n                self.__fp.close()\n        except AttributeError:\n            pass\n        finally:\n            self.__fp = None\n\n\n# --------------------------------------------------------------------\n# Image series\n\n# given a list of filenames, return a list of images\ndef loadImageSeries(filelist=None):\n    \"\"\"create a list of :py:class:`~PIL.Image.Image` objects for use in a montage\"\"\"\n    if filelist is None or len(filelist) < 1:\n        return\n\n    imglist = []\n    for img in filelist:\n        if not os.path.exists(img):\n            print(\"unable to find %s\" % img)\n            continue\n        try:\n            im = Image.open(img).convert2byte()\n        except Exception:\n            if not isSpiderImage(img):\n                print(img + \" is not a Spider image file\")\n            continue\n        im.info[\"filename\"] = img\n        imglist.append(im)\n    return imglist\n\n\n# --------------------------------------------------------------------\n# For saving images in Spider format\n\n\ndef makeSpiderHeader(im):\n    nsam, nrow = im.size\n    lenbyt = nsam * 4  # There are labrec records in the header\n    labrec = 1024 / lenbyt\n    if 1024 % lenbyt != 0:\n        labrec += 1\n    labbyt = labrec * lenbyt\n    hdr = []\n    nvalues = int(labbyt / 4)\n    for i in range(nvalues):\n        hdr.append(0.0)\n\n    if len(hdr) < 23:\n        return []\n\n    # NB these are Fortran indices\n    hdr[1] = 1.0  # nslice (=1 for an image)\n    hdr[2] = float(nrow)  # number of rows per slice\n    hdr[5] = 1.0  # iform for 2D image\n    hdr[12] = float(nsam)  # number of pixels per line\n    hdr[13] = float(labrec)  # number of records in file header\n    hdr[22] = float(labbyt)  # total number of bytes in header\n    hdr[23] = float(lenbyt)  # record length in bytes\n\n    # adjust for Fortran indexing\n    hdr = hdr[1:]\n    hdr.append(0.0)\n    # pack binary data into a string\n    hdrstr = []\n    for v in hdr:\n        hdrstr.append(struct.pack(\"f\", v))\n    return hdrstr\n\n\ndef _save(im, fp, filename):\n    if im.mode[0] != \"F\":\n        im = im.convert(\"F\")\n\n    hdr = makeSpiderHeader(im)\n    if len(hdr) < 256:\n        raise IOError(\"Error creating Spider header\")\n\n    # write the SPIDER header\n    fp.writelines(hdr)\n\n    rawmode = \"F;32NF\"  # 32-bit native floating point\n    ImageFile._save(im, fp, [(\"raw\", (0, 0) + im.size, 0, (rawmode, 0, 1))])\n\n\ndef _save_spider(im, fp, filename):\n    # get the filename extension and register it with Image\n    ext = os.path.splitext(filename)[1]\n    Image.register_extension(SpiderImageFile.format, ext)\n    _save(im, fp, filename)\n\n\n# --------------------------------------------------------------------\n\n\nImage.register_open(SpiderImageFile.format, SpiderImageFile)\nImage.register_save(SpiderImageFile.format, _save_spider)\n\nif __name__ == \"__main__\":\n\n    if len(sys.argv) < 2:\n        print(\"Syntax: python SpiderImagePlugin.py [infile] [outfile]\")\n        sys.exit()\n\n    filename = sys.argv[1]\n    if not isSpiderImage(filename):\n        print(\"input image must be in Spider format\")\n        sys.exit()\n\n    im = Image.open(filename)\n    print(\"image: \" + str(im))\n    print(\"format: \" + str(im.format))\n    print(\"size: \" + str(im.size))\n    print(\"mode: \" + str(im.mode))\n    print(\"max, min: \", end=\" \")\n    print(im.getextrema())\n\n    if len(sys.argv) > 2:\n        outfile = sys.argv[2]\n\n        # perform some image operation\n        im = im.transpose(Image.FLIP_LEFT_RIGHT)\n        print(\n            \"saving a flipped version of %s as %s \"\n            % (os.path.basename(filename), outfile)\n        )\n        im.save(outfile, SpiderImageFile.format)\n"}
A user will ask you to solve a task. You should first draft your thinking process (inner monologue). Then, generate the solution.

Your response format must follow the template below:
<think>
Your thoughts or/and draft, like working through an exercise on scratch paper. Be as casual and as long as you want until you are confident to generate a correct solution.
</think>
<solution>
Final solution presented to the user.
</solution>
system
We are currently solving the following issue within our repository. Here is the issue text:
--- BEGIN ISSUE ---
[ISSUE]
**Title:** OSError Raised When Opening SPIDER Image with Certain Dimensions

**Description:**
When saving and reopening a SPIDER image with specific dimensions, an error occurs indicating that the image file cannot be identified.

**Example Code:**
```python
from io import BytesIO
from PIL import Image

width = 100
im = Image.new('F', (width, 64))
data = BytesIO()
im.save(data, format='SPIDER')

data.seek(0)
im2 = Image.open(data)
```

**Expected Behavior:**
The image should be saved and reopened successfully without any errors.

**Actual Behavior:**
An `OSError` is raised with the message:
```
OSError: cannot identify image file <_io.BytesIO object at 0x...>
```
[/ISSUE]
--- END ISSUE ---

Below are some code segments, each from a relevant file. One or more of these files may contain bugs.

--- BEGIN FILE ---
```
### src/PIL/SpiderImagePlugin.py
#
# The Python Imaging Library.
#
# SPIDER image file handling
#
# History:
# 2004-08-02    Created BB
# 2006-03-02    added save method
# 2006-03-13    added support for stack images
#
# Copyright (c) 2004 by Health Research Inc. (HRI) RENSSELAER, NY 12144.
# Copyright (c) 2004 by William Baxter.
# Copyright (c) 2004 by Secret Labs AB.
# Copyright (c) 2004 by Fredrik Lundh.
#

##
# Image plugin for the Spider image format.  This format is is used
# by the SPIDER software, in processing image data from electron
# microscopy and tomography.
##

#
# SpiderImagePlugin.py
#
# The Spider image format is used by SPIDER software, in processing
# image data from electron microscopy and tomography.
#
# Spider home page:
# https://spider.wadsworth.org/spider_doc/spider/docs/spider.html
#
# Details about the Spider image format:
# https://spider.wadsworth.org/spider_doc/spider/docs/image_doc.html
#

from __future__ import print_function

import os
import struct
import sys

from PIL import Image, ImageFile


def isInt(f):
    try:
        i = int(f)
        if f - i == 0:
            return 1
        else:
            return 0
    except (ValueError, OverflowError):
        return 0


iforms = [1, 3, -11, -12, -21, -22]


# There is no magic number to identify Spider files, so just check a
# series of header locations to see if they have reasonable values.
# Returns no. of bytes in the header, if it is a valid Spider header,
# otherwise returns 0


def isSpiderHeader(t):
    h = (99,) + t  # add 1 value so can use spider header index start=1
    # header values 1,2,5,12,13,22,23 should be integers
    for i in [1, 2, 5, 12, 13, 22, 23]:
        if not isInt(h[i]):
            return 0
    # check iform
    iform = int(h[5])
    if iform not in iforms:
        return 0
    # check other header values
    labrec = int(h[13])  # no. records in file header
    labbyt = int(h[22])  # total no. of bytes in header
    lenbyt = int(h[23])  # record length in bytes
    if labbyt != (labrec * lenbyt):
        return 0
    # looks like a valid header
    return labbyt


def isSpiderImage(filename):
    with open(filename, "rb") as fp:
        f = fp.read(92)  # read 23 * 4 bytes
    t = struct.unpack(">23f", f)  # try big-endian first
    hdrlen = isSpiderHeader(t)
    if hdrlen == 0:
        t = struct.unpack("<23f", f)  # little-endian
        hdrlen = isSpiderHeader(t)
    return hdrlen


class SpiderImageFile(ImageFile.ImageFile):

    format = "SPIDER"
    format_description = "Spider 2D image"
    _close_exclusive_fp_after_loading = False

    def _open(self):
        # check header
        n = 27 * 4  # read 27 float values
        f = self.fp.read(n)

        try:
            self.bigendian = 1
            t = struct.unpack(">27f", f)  # try big-endian first
            hdrlen = isSpiderHeader(t)
            if hdrlen == 0:
                self.bigendian = 0
                t = struct.unpack("<27f", f)  # little-endian
                hdrlen = isSpiderHeader(t)
            if hdrlen == 0:
                raise SyntaxError("not a valid Spider file")
        except struct.error:
            raise SyntaxError("not a valid Spider file")

        h = (99,) + t  # add 1 value : spider header index starts at 1
        iform = int(h[5])
        if iform != 1:
            raise SyntaxError("not a Spider 2D image")

        self._size = int(h[12]), int(h[2])  # size in pixels (width, height)
        self.istack = int(h[24])
        self.imgnumber = int(h[27])

        if self.istack == 0 and self.imgnumber == 0:
            # stk=0, img=0: a regular 2D image
            offset = hdrlen
            self._nimages = 1
        elif self.istack > 0 and self.imgnumber == 0:
            # stk>0, img=0: Opening the stack for the first time
            self.imgbytes = int(h[12]) * int(h[2]) * 4
            self.hdrlen = hdrlen
            self._nimages = int(h[26])
            # Point to the first image in the stack
            offset = hdrlen * 2
            self.imgnumber = 1
        elif self.istack == 0 and self.imgnumber > 0:
            # stk=0, img>0: an image within the stack
            offset = hdrlen + self.stkoffset
            self.istack = 2  # So Image knows it's still a stack
        else:
            raise SyntaxError("inconsistent stack header values")

        if self.bigendian:
            self.rawmode = "F;32BF"
        else:
            self.rawmode = "F;32F"
        self.mode = "F"

        self.tile = [("raw", (0, 0) + self.size, offset, (self.rawmode, 0, 1))]
        self.__fp = self.fp  # FIXME: hack

    @property
    def n_frames(self):
        return self._nimages

    @property
    def is_animated(self):
        return self._nimages > 1

    # 1st image index is zero (although SPIDER imgnumber starts at 1)
    def tell(self):
        if self.imgnumber < 1:
            return 0
        else:
            return self.imgnumber - 1

    def seek(self, frame):
        if self.istack == 0:
            raise EOFError("attempt to seek in a non-stack file")
        if not self._seek_check(frame):
            return
        self.stkoffset = self.hdrlen + frame * (self.hdrlen + self.imgbytes)
        self.fp = self.__fp
        self.fp.seek(self.stkoffset)
        self._open()

    # returns a byte image after rescaling to 0..255
    def convert2byte(self, depth=255):
        (minimum, maximum) = self.getextrema()
        m = 1
        if maximum != minimum:
            m = depth / (maximum - minimum)
        b = -m * minimum
        return self.point(lambda i, m=m, b=b: i * m + b).convert("L")

    # returns a ImageTk.PhotoImage object, after rescaling to 0..255
    def tkPhotoImage(self):
        from PIL import ImageTk

        return ImageTk.PhotoImage(self.convert2byte(), palette=256)

    def _close__fp(self):
        try:
            if self.__fp != self.fp:
                self.__fp.close()
        except AttributeError:
            pass
        finally:
            self.__fp = None


# --------------------------------------------------------------------
# Image series

# given a list of filenames, return a list of images
def loadImageSeries(filelist=None):
    """create a list of :py:class:`~PIL.Image.Image` objects for use in a montage"""
    if filelist is None or len(filelist) < 1:
        return

    imglist = []
    for img in filelist:
        if not os.path.exists(img):
            print("unable to find %s" % img)
            continue
        try:
            im = Image.open(img).convert2byte()
        except Exception:
            if not isSpiderImage(img):
                print(img + " is not a Spider image file")
            continue
        im.info["filename"] = img
        imglist.append(im)
    return imglist


# --------------------------------------------------------------------
# For saving images in Spider format


def makeSpiderHeader(im):
    nsam, nrow = im.size
    lenbyt = nsam * 4  # There are labrec records in the header
    labrec = 1024 / lenbyt
    if 1024 % lenbyt != 0:
        labrec += 1
    labbyt = labrec * lenbyt
    hdr = []
    nvalues = int(labbyt / 4)
    for i in range(nvalues):
        hdr.append(0.0)

    if len(hdr) < 23:
        return []

    # NB these are Fortran indices
    hdr[1] = 1.0  # nslice (=1 for an image)
    hdr[2] = float(nrow)  # number of rows per slice
    hdr[5] = 1.0  # iform for 2D image
    hdr[12] = float(nsam)  # number of pixels per line
    hdr[13] = float(labrec)  # number of records in file header
    hdr[22] = float(labbyt)  # total number of bytes in header
    hdr[23] = float(lenbyt)  # record length in bytes

    # adjust for Fortran indexing
    hdr = hdr[1:]
    hdr.append(0.0)
    # pack binary data into a string
    hdrstr = []
    for v in hdr:
        hdrstr.append(struct.pack("f", v))
    return hdrstr


def _save(im, fp, filename):
    if im.mode[0] != "F":
        im = im.convert("F")

    hdr = makeSpiderHeader(im)
    if len(hdr) < 256:
        raise IOError("Error creating Spider header")

    # write the SPIDER header
    fp.writelines(hdr)

    rawmode = "F;32NF"  # 32-bit native floating point
    ImageFile._save(im, fp, [("raw", (0, 0) + im.size, 0, (rawmode, 0, 1))])


def _save_spider(im, fp, filename):
    # get the filename extension and register it with Image
    ext = os.path.splitext(filename)[1]
    Image.register_extension(SpiderImageFile.format, ext)
    _save(im, fp, filename)


# --------------------------------------------------------------------


Image.register_open(SpiderImageFile.format, SpiderImageFile)
Image.register_save(SpiderImageFile.format, _save_spider)

if __name__ == "__main__":

    if len(sys.argv) < 2:
        print("Syntax: python SpiderImagePlugin.py [infile] [outfile]")
        sys.exit()

    filename = sys.argv[1]
    if not isSpiderImage(filename):
        print("input image must be in Spider format")
        sys.exit()

    im = Image.open(filename)
    print("image: " + str(im))
    print("format: " + str(im.format))
    print("size: " + str(im.size))
    print("mode: " + str(im.mode))
    print("max, min: ", end=" ")
    print(im.getextrema())

    if len(sys.argv) > 2:
        outfile = sys.argv[2]

        # perform some image operation
        im = im.transpose(Image.FLIP_LEFT_RIGHT)
        print(
            "saving a flipped version of %s as %s "
            % (os.path.basename(filename), outfile)
        )
        im.save(outfile, SpiderImageFile.format)

```
--- END FILE ---

Please first localize the bug based on the issue statement, and then generate *SEARCH/REPLACE* edits to fix the issue.

Every *SEARCH/REPLACE* edit must use this format:
1. The file path
2. The start of search block: <<<<<<< SEARCH
3. A contiguous chunk of lines to search for in the existing source code
4. The dividing line: =======
5. The lines to replace into the source code
6. The end of the replace block: >>>>>>> REPLACE

Here is an example:

```python
### mathweb/flask/app.py
<<<<<<< SEARCH
from flask import Flask
=======
import math
from flask import Flask
>>>>>>> REPLACE
```
</solution>

Please note that the *SEARCH/REPLACE* edit REQUIRES PROPER INDENTATION. If you would like to add the line '        print(x)', you must fully write that out, with all those spaces before the code!
Wrap each *SEARCH/REPLACE* edit in a code block as shown in the example above. If you have multiple *SEARCH/REPLACE* edits, use a separate code block for each one.
user