{
    "file_diffs": [
        {
            "old_file_content": "import pytest\nfrom PIL import Image, ImageShow\n\nfrom .helper import hopper, is_win32, on_ci\n\n\ndef test_sanity():\n    dir(Image)\n    dir(ImageShow)\n\n\ndef test_register():\n    # Test registering a viewer that is not a class\n    ImageShow.register(\"not a class\")\n\n    # Restore original state\n    ImageShow._viewers.pop()\n\n\ndef test_viewer_show():\n    class TestViewer(ImageShow.Viewer):\n        methodCalled = False\n\n        def show_image(self, image, **options):\n            self.methodCalled = True\n            return True\n\n    viewer = TestViewer()\n    ImageShow.register(viewer, -1)\n\n    for mode in (\"1\", \"I;16\", \"LA\", \"RGB\", \"RGBA\"):\n        with hopper() as im:\n            assert ImageShow.show(im)\n        assert viewer.methodCalled\n\n    # Restore original state\n    ImageShow._viewers.pop(0)\n\n\n@pytest.mark.skipif(\n    not on_ci() or is_win32(), reason=\"Only run on CIs; hangs on Windows CIs\",\n)\ndef test_show():\n    for mode in (\"1\", \"I;16\", \"LA\", \"RGB\", \"RGBA\"):\n        im = hopper(mode)\n        assert ImageShow.show(im)\n\n\ndef test_viewer():\n    viewer = ImageShow.Viewer()\n\n    assert viewer.get_format(None) is None\n\n    with pytest.raises(NotImplementedError):\n        viewer.get_command(None)\n\n\ndef test_viewers():\n    for viewer in ImageShow._viewers:\n        viewer.get_command(\"test.jpg\")\n",
            "new_file_content": "import pytest\nfrom PIL import Image, ImageShow\n\nfrom .helper import hopper, is_win32, on_ci\n\n\ndef test_sanity():\n    dir(Image)\n    dir(ImageShow)\n\n\ndef test_register():\n    # Test registering a viewer that is not a class\n    ImageShow.register(\"not a class\")\n\n    # Restore original state\n    ImageShow._viewers.pop()\n\n\n@pytest.mark.parametrize(\n    \"order\", [-1, 0],\n)\ndef test_viewer_show(order):\n    class TestViewer(ImageShow.Viewer):\n        def show_image(self, image, **options):\n            self.methodCalled = True\n            return True\n\n    viewer = TestViewer()\n    ImageShow.register(viewer, order)\n\n    for mode in (\"1\", \"I;16\", \"LA\", \"RGB\", \"RGBA\"):\n        viewer.methodCalled = False\n        with hopper(mode) as im:\n            assert ImageShow.show(im)\n        assert viewer.methodCalled\n\n    # Restore original state\n    ImageShow._viewers.pop(0)\n\n\n@pytest.mark.skipif(\n    not on_ci() or is_win32(), reason=\"Only run on CIs; hangs on Windows CIs\",\n)\ndef test_show():\n    for mode in (\"1\", \"I;16\", \"LA\", \"RGB\", \"RGBA\"):\n        im = hopper(mode)\n        assert ImageShow.show(im)\n\n\ndef test_viewer():\n    viewer = ImageShow.Viewer()\n\n    assert viewer.get_format(None) is None\n\n    with pytest.raises(NotImplementedError):\n        viewer.get_command(None)\n\n\ndef test_viewers():\n    for viewer in ImageShow._viewers:\n        viewer.get_command(\"test.jpg\")\n",
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                    "path": "Tests/test_imageshow.py"
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                    },
                    "line_group": {
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                            {
                                "content": "    ImageShow._viewers.pop()",
                                "type": "context"
                            },
                            {
                                "content": "",
                                "type": "context"
                            },
                            {
                                "content": "",
                                "type": "context"
                            },
                            {
                                "content": "def test_viewer_show():",
                                "type": "deleted"
                            },
                            {
                                "content": "@pytest.mark.parametrize(",
                                "type": "added"
                            },
                            {
                                "content": "    \"order\", [-1, 0],",
                                "type": "added"
                            },
                            {
                                "content": ")",
                                "type": "added"
                            },
                            {
                                "content": "def test_viewer_show(order):",
                                "type": "added"
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                            {
                                "content": "    class TestViewer(ImageShow.Viewer):",
                                "type": "context"
                            },
                            {
                                "content": "        methodCalled = False",
                                "type": "deleted"
                            },
                            {
                                "content": "",
                                "type": "deleted"
                            },
                            {
                                "content": "        def show_image(self, image, **options):",
                                "type": "context"
                            },
                            {
                                "content": "            self.methodCalled = True",
                                "type": "context"
                            },
                            {
                                "content": "            return True",
                                "type": "context"
                            },
                            {
                                "content": "",
                                "type": "context"
                            },
                            {
                                "content": "    viewer = TestViewer()",
                                "type": "context"
                            },
                            {
                                "content": "    ImageShow.register(viewer, -1)",
                                "type": "deleted"
                            },
                            {
                                "content": "    ImageShow.register(viewer, order)",
                                "type": "added"
                            },
                            {
                                "content": "",
                                "type": "context"
                            },
                            {
                                "content": "    for mode in (\"1\", \"I;16\", \"LA\", \"RGB\", \"RGBA\"):",
                                "type": "context"
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                            {
                                "content": "        with hopper() as im:",
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                            {
                                "content": "        viewer.methodCalled = False",
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                            {
                                "content": "        with hopper(mode) as im:",
                                "type": "added"
                            },
                            {
                                "content": "            assert ImageShow.show(im)",
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                            {
                                "content": "        assert viewer.methodCalled",
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                            "file_name": "Tests/test_imageshow.py",
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                            "content": "def test_viewer_show():\n    class TestViewer(ImageShow.Viewer):\n        methodCalled = False\n\n        def show_image(self, image, **options):\n            self.methodCalled = True\n            return True\n\n    viewer = TestViewer()\n    ImageShow.register(viewer, -1)\n\n    for mode in (\"1\", \"I;16\", \"LA\", \"RGB\", \"RGBA\"):\n        with hopper() as im:\n            assert ImageShow.show(im)\n        assert viewer.methodCalled\n\n    # Restore original state\n    ImageShow._viewers.pop(0)",
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            "old_file_content": "#\n# The Python Imaging Library.\n# $Id$\n#\n# im.show() drivers\n#\n# History:\n# 2008-04-06 fl   Created\n#\n# Copyright (c) Secret Labs AB 2008.\n#\n# See the README file for information on usage and redistribution.\n#\nimport os\nimport shutil\nimport subprocess\nimport sys\nimport tempfile\nfrom shlex import quote\n\nfrom PIL import Image\n\n_viewers = []\n\n\ndef register(viewer, order=1):\n    try:\n        if issubclass(viewer, Viewer):\n            viewer = viewer()\n    except TypeError:\n        pass  # raised if viewer wasn't a class\n    if order > 0:\n        _viewers.append(viewer)\n    elif order < 0:\n        _viewers.insert(0, viewer)\n\n\ndef show(image, title=None, **options):\n    r\"\"\"\n    Display a given image.\n\n    :param image: An image object.\n    :param title: Optional title.  Not all viewers can display the title.\n    :param \\**options: Additional viewer options.\n    :returns: True if a suitable viewer was found, false otherwise.\n    \"\"\"\n    for viewer in _viewers:\n        if viewer.show(image, title=title, **options):\n            return 1\n    return 0\n\n\nclass Viewer:\n    \"\"\"Base class for viewers.\"\"\"\n\n    # main api\n\n    def show(self, image, **options):\n\n        # save temporary image to disk\n        if not (\n            image.mode in (\"1\", \"RGBA\") or (self.format == \"PNG\" and image.mode == \"LA\")\n        ):\n            base = Image.getmodebase(image.mode)\n            if image.mode != base:\n                image = image.convert(base)\n\n        return self.show_image(image, **options)\n\n    # hook methods\n\n    format = None\n    options = {}\n\n    def get_format(self, image):\n        \"\"\"Return format name, or None to save as PGM/PPM\"\"\"\n        return self.format\n\n    def get_command(self, file, **options):\n        raise NotImplementedError\n\n    def save_image(self, image):\n        \"\"\"Save to temporary file, and return filename\"\"\"\n        return image._dump(format=self.get_format(image), **self.options)\n\n    def show_image(self, image, **options):\n        \"\"\"Display given image\"\"\"\n        return self.show_file(self.save_image(image), **options)\n\n    def show_file(self, file, **options):\n        \"\"\"Display given file\"\"\"\n        os.system(self.get_command(file, **options))\n        return 1\n\n\n# --------------------------------------------------------------------\n\n\nif sys.platform == \"win32\":\n\n    class WindowsViewer(Viewer):\n        format = \"PNG\"\n        options = {\"compress_level\": 1}\n\n        def get_command(self, file, **options):\n            return (\n                'start \"Pillow\" /WAIT \"%s\" '\n                \"&& ping -n 2 127.0.0.1 >NUL \"\n                '&& del /f \"%s\"' % (file, file)\n            )\n\n    register(WindowsViewer)\n\nelif sys.platform == \"darwin\":\n\n    class MacViewer(Viewer):\n        format = \"PNG\"\n        options = {\"compress_level\": 1}\n\n        def get_command(self, file, **options):\n            # on darwin open returns immediately resulting in the temp\n            # file removal while app is opening\n            command = \"open -a Preview.app\"\n            command = \"({} {}; sleep 20; rm -f {})&\".format(\n                command, quote(file), quote(file)\n            )\n            return command\n\n        def show_file(self, file, **options):\n            \"\"\"Display given file\"\"\"\n            fd, path = tempfile.mkstemp()\n            with os.fdopen(fd, \"w\") as f:\n                f.write(file)\n            with open(path, \"r\") as f:\n                subprocess.Popen(\n                    [\"im=$(cat); open -a Preview.app $im; sleep 20; rm -f $im\"],\n                    shell=True,\n                    stdin=f,\n                )\n            os.remove(path)\n            return 1\n\n    register(MacViewer)\n\nelse:\n\n    # unixoids\n\n    class UnixViewer(Viewer):\n        format = \"PNG\"\n        options = {\"compress_level\": 1}\n\n        def get_command(self, file, **options):\n            command = self.get_command_ex(file, **options)[0]\n            return \"({} {}; rm -f {})&\".format(command, quote(file), quote(file))\n\n        def show_file(self, file, **options):\n            \"\"\"Display given file\"\"\"\n            fd, path = tempfile.mkstemp()\n            with os.fdopen(fd, \"w\") as f:\n                f.write(file)\n            with open(path, \"r\") as f:\n                command = self.get_command_ex(file, **options)[0]\n                subprocess.Popen(\n                    [\"im=$(cat);\" + command + \" $im; rm -f $im\"], shell=True, stdin=f\n                )\n            os.remove(path)\n            return 1\n\n    # implementations\n\n    class DisplayViewer(UnixViewer):\n        def get_command_ex(self, file, **options):\n            command = executable = \"display\"\n            return command, executable\n\n    if shutil.which(\"display\"):\n        register(DisplayViewer)\n\n    class EogViewer(UnixViewer):\n        def get_command_ex(self, file, **options):\n            command = executable = \"eog\"\n            return command, executable\n\n    if shutil.which(\"eog\"):\n        register(EogViewer)\n\n    class XVViewer(UnixViewer):\n        def get_command_ex(self, file, title=None, **options):\n            # note: xv is pretty outdated.  most modern systems have\n            # imagemagick's display command instead.\n            command = executable = \"xv\"\n            if title:\n                command += \" -name %s\" % quote(title)\n            return command, executable\n\n    if shutil.which(\"xv\"):\n        register(XVViewer)\n\nif __name__ == \"__main__\":\n\n    if len(sys.argv) < 2:\n        print(\"Syntax: python ImageShow.py imagefile [title]\")\n        sys.exit()\n\n    with Image.open(sys.argv[1]) as im:\n        print(show(im, *sys.argv[2:]))\n",
            "new_file_content": "#\n# The Python Imaging Library.\n# $Id$\n#\n# im.show() drivers\n#\n# History:\n# 2008-04-06 fl   Created\n#\n# Copyright (c) Secret Labs AB 2008.\n#\n# See the README file for information on usage and redistribution.\n#\nimport os\nimport shutil\nimport subprocess\nimport sys\nimport tempfile\nfrom shlex import quote\n\nfrom PIL import Image\n\n_viewers = []\n\n\ndef register(viewer, order=1):\n    try:\n        if issubclass(viewer, Viewer):\n            viewer = viewer()\n    except TypeError:\n        pass  # raised if viewer wasn't a class\n    if order > 0:\n        _viewers.append(viewer)\n    else:\n        _viewers.insert(0, viewer)\n\n\ndef show(image, title=None, **options):\n    r\"\"\"\n    Display a given image.\n\n    :param image: An image object.\n    :param title: Optional title.  Not all viewers can display the title.\n    :param \\**options: Additional viewer options.\n    :returns: True if a suitable viewer was found, false otherwise.\n    \"\"\"\n    for viewer in _viewers:\n        if viewer.show(image, title=title, **options):\n            return 1\n    return 0\n\n\nclass Viewer:\n    \"\"\"Base class for viewers.\"\"\"\n\n    # main api\n\n    def show(self, image, **options):\n\n        # save temporary image to disk\n        if not (\n            image.mode in (\"1\", \"RGBA\") or (self.format == \"PNG\" and image.mode == \"LA\")\n        ):\n            base = Image.getmodebase(image.mode)\n            if image.mode != base:\n                image = image.convert(base)\n\n        return self.show_image(image, **options)\n\n    # hook methods\n\n    format = None\n    options = {}\n\n    def get_format(self, image):\n        \"\"\"Return format name, or None to save as PGM/PPM\"\"\"\n        return self.format\n\n    def get_command(self, file, **options):\n        raise NotImplementedError\n\n    def save_image(self, image):\n        \"\"\"Save to temporary file, and return filename\"\"\"\n        return image._dump(format=self.get_format(image), **self.options)\n\n    def show_image(self, image, **options):\n        \"\"\"Display given image\"\"\"\n        return self.show_file(self.save_image(image), **options)\n\n    def show_file(self, file, **options):\n        \"\"\"Display given file\"\"\"\n        os.system(self.get_command(file, **options))\n        return 1\n\n\n# --------------------------------------------------------------------\n\n\nif sys.platform == \"win32\":\n\n    class WindowsViewer(Viewer):\n        format = \"PNG\"\n        options = {\"compress_level\": 1}\n\n        def get_command(self, file, **options):\n            return (\n                'start \"Pillow\" /WAIT \"%s\" '\n                \"&& ping -n 2 127.0.0.1 >NUL \"\n                '&& del /f \"%s\"' % (file, file)\n            )\n\n    register(WindowsViewer)\n\nelif sys.platform == \"darwin\":\n\n    class MacViewer(Viewer):\n        format = \"PNG\"\n        options = {\"compress_level\": 1}\n\n        def get_command(self, file, **options):\n            # on darwin open returns immediately resulting in the temp\n            # file removal while app is opening\n            command = \"open -a Preview.app\"\n            command = \"({} {}; sleep 20; rm -f {})&\".format(\n                command, quote(file), quote(file)\n            )\n            return command\n\n        def show_file(self, file, **options):\n            \"\"\"Display given file\"\"\"\n            fd, path = tempfile.mkstemp()\n            with os.fdopen(fd, \"w\") as f:\n                f.write(file)\n            with open(path, \"r\") as f:\n                subprocess.Popen(\n                    [\"im=$(cat); open -a Preview.app $im; sleep 20; rm -f $im\"],\n                    shell=True,\n                    stdin=f,\n                )\n            os.remove(path)\n            return 1\n\n    register(MacViewer)\n\nelse:\n\n    # unixoids\n\n    class UnixViewer(Viewer):\n        format = \"PNG\"\n        options = {\"compress_level\": 1}\n\n        def get_command(self, file, **options):\n            command = self.get_command_ex(file, **options)[0]\n            return \"({} {}; rm -f {})&\".format(command, quote(file), quote(file))\n\n        def show_file(self, file, **options):\n            \"\"\"Display given file\"\"\"\n            fd, path = tempfile.mkstemp()\n            with os.fdopen(fd, \"w\") as f:\n                f.write(file)\n            with open(path, \"r\") as f:\n                command = self.get_command_ex(file, **options)[0]\n                subprocess.Popen(\n                    [\"im=$(cat);\" + command + \" $im; rm -f $im\"], shell=True, stdin=f\n                )\n            os.remove(path)\n            return 1\n\n    # implementations\n\n    class DisplayViewer(UnixViewer):\n        def get_command_ex(self, file, **options):\n            command = executable = \"display\"\n            return command, executable\n\n    if shutil.which(\"display\"):\n        register(DisplayViewer)\n\n    class EogViewer(UnixViewer):\n        def get_command_ex(self, file, **options):\n            command = executable = \"eog\"\n            return command, executable\n\n    if shutil.which(\"eog\"):\n        register(EogViewer)\n\n    class XVViewer(UnixViewer):\n        def get_command_ex(self, file, title=None, **options):\n            # note: xv is pretty outdated.  most modern systems have\n            # imagemagick's display command instead.\n            command = executable = \"xv\"\n            if title:\n                command += \" -name %s\" % quote(title)\n            return command, executable\n\n    if shutil.which(\"xv\"):\n        register(XVViewer)\n\nif __name__ == \"__main__\":\n\n    if len(sys.argv) < 2:\n        print(\"Syntax: python ImageShow.py imagefile [title]\")\n        sys.exit()\n\n    with Image.open(sys.argv[1]) as im:\n        print(show(im, *sys.argv[2:]))\n",
            "header": {
                "file": {
                    "path": "src/PIL/ImageShow.py"
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                            "file_name": "src/PIL/ImageShow.py",
                            "type": "function",
                            "name": "register",
                            "content": "def register(viewer, order=1):\n    try:\n        if issubclass(viewer, Viewer):\n            viewer = viewer()\n    except TypeError:\n        pass  # raised if viewer wasn't a class\n    if order > 0:\n        _viewers.append(viewer)\n    elif order < 0:\n        _viewers.insert(0, viewer)",
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    "old_commit_hash": "6ad98ba3c0c371c9bddf53b0939e7632ede8c2b7^",
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    "commit_message": "Do not ignore viewer if order is zero when registering",
    "commit_date": "2020-06-18T21:40:38+10:00",
    "metadata": {}
}
{
    "repo_name": "pillow",
    "new_commit_hash": "6ad98ba3c0c371c9bddf53b0939e7632ede8c2b7",
    "test_file_codes": [
        "import pytest\nfrom PIL import Image, ImageShow\n\nfrom .helper import hopper, is_win32, on_ci\n\n\ndef test_sanity():\n    dir(Image)\n    dir(ImageShow)\n\n\ndef test_register():\n    # Test registering a viewer that is not a class\n    ImageShow.register(\"not a class\")\n\n    # Restore original state\n    ImageShow._viewers.pop()\n\n\n@pytest.mark.parametrize(\n    \"order\", [-1, 0],\n)\ndef test_viewer_show(order):\n    class TestViewer(ImageShow.Viewer):\n        def show_image(self, image, **options):\n            self.methodCalled = True\n            return True\n\n    viewer = TestViewer()\n    ImageShow.register(viewer, order)\n\n    for mode in (\"1\", \"I;16\", \"LA\", \"RGB\", \"RGBA\"):\n        viewer.methodCalled = False\n        with hopper(mode) as im:\n            assert ImageShow.show(im)\n        assert viewer.methodCalled\n\n    # Restore original state\n    ImageShow._viewers.pop(0)\n\n\n@pytest.mark.skipif(\n    not on_ci() or is_win32(), reason=\"Only run on CIs; hangs on Windows CIs\",\n)\ndef test_show():\n    for mode in (\"1\", \"I;16\", \"LA\", \"RGB\", \"RGBA\"):\n        im = hopper(mode)\n        assert ImageShow.show(im)\n\n\ndef test_viewer():\n    viewer = ImageShow.Viewer()\n\n    assert viewer.get_format(None) is None\n\n    with pytest.raises(NotImplementedError):\n        viewer.get_command(None)\n\n\ndef test_viewers():\n    for viewer in ImageShow._viewers:\n        viewer.get_command(\"test.jpg\")\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 16ms\nInstalled 12 packages in 257ms\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 674ms\nPrepared 1 package in 32.97s\nInstalled 1 package in 3ms\n + pillow==7.2.0.dev0 (from file:///home/gcpuser/buckets/local_repoeval_bucket/repos/pillow_6ad98ba3c0c371c9bddf53b0939e7632ede8c2b7)\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_6ad98ba3c0c371c9bddf53b0939e7632ede8c2b7\nconfigfile: setup.cfg\nplugins: cov-6.0.0\ncollected 7 items\n\nr2e_tests/test_1.py ....s..                                              [100%]\n\n==================================== PASSES ====================================\n=========================== short test summary info ============================\nPASSED r2e_tests/test_1.py::test_sanity\nPASSED r2e_tests/test_1.py::test_register\nPASSED r2e_tests/test_1.py::test_viewer_show[-1]\nPASSED r2e_tests/test_1.py::test_viewer_show[0]\nPASSED r2e_tests/test_1.py::test_viewer\nPASSED r2e_tests/test_1.py::test_viewers\nSKIPPED [1] r2e_tests/test_1.py:42: Only run on CIs; hangs on Windows CIs\n========================= 6 passed, 1 skipped in 0.11s =========================\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_6ad98ba3c0c371c9bddf53b0939e7632ede8c2b7\nconfigfile: setup.cfg\nplugins: cov-6.0.0\ncollected 7 items\n\nr2e_tests/test_1.py ...Fs..                                              [100%]\n\n=================================== FAILURES ===================================\n_____________________________ test_viewer_show[0] ______________________________\n\norder = 0\n\n    @pytest.mark.parametrize(\n        \"order\", [-1, 0],\n    )\n    def test_viewer_show(order):\n        class TestViewer(ImageShow.Viewer):\n            def show_image(self, image, **options):\n                self.methodCalled = True\n                return True\n    \n        viewer = TestViewer()\n        ImageShow.register(viewer, order)\n    \n        for mode in (\"1\", \"I;16\", \"LA\", \"RGB\", \"RGBA\"):\n            viewer.methodCalled = False\n            with hopper(mode) as im:\n>               assert ImageShow.show(im)\nE               assert 0\nE                +  where 0 = <function show at 0x78ece7959c10>(<PIL.Image.Image image mode=1 size=128x128 at 0x78ECE797DFD0>)\nE                +    where <function show at 0x78ece7959c10> = ImageShow.show\n\nr2e_tests/test_1.py:35: AssertionError\n==================================== PASSES ====================================\n=========================== short test summary info ============================\nPASSED r2e_tests/test_1.py::test_sanity\nPASSED r2e_tests/test_1.py::test_register\nPASSED r2e_tests/test_1.py::test_viewer_show[-1]\nPASSED r2e_tests/test_1.py::test_viewer\nPASSED r2e_tests/test_1.py::test_viewers\nSKIPPED [1] r2e_tests/test_1.py:42: Only run on CIs; hangs on Windows CIs\nFAILED r2e_tests/test_1.py::test_viewer_show[0] - assert 0\n==================== 1 failed, 5 passed, 1 skipped in 0.08s ====================\n",
    "old_commit_res_stderr": ""
}
Tests/test_imageshow.py src/PIL/ImageShow.py
We are currently solving the following issue within our repository. Here is the issue text:
--- BEGIN ISSUE ---
[ISSUE]
**Title:** Viewer Registered with Order 0 Is Ignored, Preventing Image Display

**Description**
When registering a viewer with an order value of `0`, the viewer is not added to the list of active viewers. This causes image display functions to fail in invoking the viewer's `show_image` method.

**Example Code:**
```python
class TestViewer(ImageShow.Viewer):
    def show_image(self, image, **options):
        self.method_called = True
        return True

viewer = TestViewer()
ImageShow.register(viewer, order=0)

# Attempt to display an image
ImageShow.show(some_image)
```
In this example, `viewer.method_called` remains `False` because the viewer was not properly registered.

**Expected Behavior**
Viewers registered with an order of `0` should be added to the viewers list and their `show_image` method should be called when attempting to display an image.

**Actual Behavior**
Viewers registered with an order of `0` are ignored, resulting in their `show_image` method not being called. Consequently, image display does not utilize the intended viewer and fails to show the image as expected.
[/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/ImageShow.py
#
# The Python Imaging Library.
# $Id$
#
# im.show() drivers
#
# History:
# 2008-04-06 fl   Created
#
# Copyright (c) Secret Labs AB 2008.
#
# See the README file for information on usage and redistribution.
#
import os
import shutil
import subprocess
import sys
import tempfile
from shlex import quote

from PIL import Image

_viewers = []


def register(viewer, order=1):
    try:
        if issubclass(viewer, Viewer):
            viewer = viewer()
    except TypeError:
        pass  # raised if viewer wasn't a class
    if order > 0:
        _viewers.append(viewer)
    elif order < 0:
        _viewers.insert(0, viewer)


def show(image, title=None, **options):
    r"""
    Display a given image.

    :param image: An image object.
    :param title: Optional title.  Not all viewers can display the title.
    :param \**options: Additional viewer options.
    :returns: True if a suitable viewer was found, false otherwise.
    """
    for viewer in _viewers:
        if viewer.show(image, title=title, **options):
            return 1
    return 0


class Viewer:
    """Base class for viewers."""

    # main api

    def show(self, image, **options):

        # save temporary image to disk
        if not (
            image.mode in ("1", "RGBA") or (self.format == "PNG" and image.mode == "LA")
        ):
            base = Image.getmodebase(image.mode)
            if image.mode != base:
                image = image.convert(base)

        return self.show_image(image, **options)

    # hook methods

    format = None
    options = {}

    def get_format(self, image):
        """Return format name, or None to save as PGM/PPM"""
        return self.format

    def get_command(self, file, **options):
        raise NotImplementedError

    def save_image(self, image):
        """Save to temporary file, and return filename"""
        return image._dump(format=self.get_format(image), **self.options)

    def show_image(self, image, **options):
        """Display given image"""
        return self.show_file(self.save_image(image), **options)

    def show_file(self, file, **options):
        """Display given file"""
        os.system(self.get_command(file, **options))
        return 1


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


if sys.platform == "win32":

    class WindowsViewer(Viewer):
        format = "PNG"
        options = {"compress_level": 1}

        def get_command(self, file, **options):
            return (
                'start "Pillow" /WAIT "%s" '
                "&& ping -n 2 127.0.0.1 >NUL "
                '&& del /f "%s"' % (file, file)
            )

    register(WindowsViewer)

elif sys.platform == "darwin":

    class MacViewer(Viewer):
        format = "PNG"
        options = {"compress_level": 1}

        def get_command(self, file, **options):
            # on darwin open returns immediately resulting in the temp
            # file removal while app is opening
            command = "open -a Preview.app"
            command = "({} {}; sleep 20; rm -f {})&".format(
                command, quote(file), quote(file)
            )
            return command

        def show_file(self, file, **options):
            """Display given file"""
            fd, path = tempfile.mkstemp()
            with os.fdopen(fd, "w") as f:
                f.write(file)
            with open(path, "r") as f:
                subprocess.Popen(
                    ["im=$(cat); open -a Preview.app $im; sleep 20; rm -f $im"],
                    shell=True,
                    stdin=f,
                )
            os.remove(path)
            return 1

    register(MacViewer)

else:

    # unixoids

    class UnixViewer(Viewer):
        format = "PNG"
        options = {"compress_level": 1}

        def get_command(self, file, **options):
            command = self.get_command_ex(file, **options)[0]
            return "({} {}; rm -f {})&".format(command, quote(file), quote(file))

        def show_file(self, file, **options):
            """Display given file"""
            fd, path = tempfile.mkstemp()
            with os.fdopen(fd, "w") as f:
                f.write(file)
            with open(path, "r") as f:
                command = self.get_command_ex(file, **options)[0]
                subprocess.Popen(
                    ["im=$(cat);" + command + " $im; rm -f $im"], shell=True, stdin=f
                )
            os.remove(path)
            return 1

    # implementations

    class DisplayViewer(UnixViewer):
        def get_command_ex(self, file, **options):
            command = executable = "display"
            return command, executable

    if shutil.which("display"):
        register(DisplayViewer)

    class EogViewer(UnixViewer):
        def get_command_ex(self, file, **options):
            command = executable = "eog"
            return command, executable

    if shutil.which("eog"):
        register(EogViewer)

    class XVViewer(UnixViewer):
        def get_command_ex(self, file, title=None, **options):
            # note: xv is pretty outdated.  most modern systems have
            # imagemagick's display command instead.
            command = executable = "xv"
            if title:
                command += " -name %s" % quote(title)
            return command, executable

    if shutil.which("xv"):
        register(XVViewer)

if __name__ == "__main__":

    if len(sys.argv) < 2:
        print("Syntax: python ImageShow.py imagefile [title]")
        sys.exit()

    with Image.open(sys.argv[1]) as im:
        print(show(im, *sys.argv[2:]))

```
--- 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:** Viewer Registered with Order 0 Is Ignored, Preventing Image Display

**Description**
When registering a viewer with an order value of `0`, the viewer is not added to the list of active viewers. This causes image display functions to fail in invoking the viewer's `show_image` method.

**Example Code:**
```python
class TestViewer(ImageShow.Viewer):
    def show_image(self, image, **options):
        self.method_called = True
        return True

viewer = TestViewer()
ImageShow.register(viewer, order=0)

# Attempt to display an image
ImageShow.show(some_image)
```
In this example, `viewer.method_called` remains `False` because the viewer was not properly registered.

**Expected Behavior**
Viewers registered with an order of `0` should be added to the viewers list and their `show_image` method should be called when attempting to display an image.

**Actual Behavior**
Viewers registered with an order of `0` are ignored, resulting in their `show_image` method not being called. Consequently, image display does not utilize the intended viewer and fails to show the image as expected.
[/ISSUE]
{
    "test_sanity": "PASSED",
    "test_register": "PASSED",
    "test_viewer_show[-1]": "PASSED",
    "test_viewer_show[0]": "PASSED",
    "test_viewer": "PASSED",
    "test_viewers": "PASSED"
}
diff --git a/src/PIL/ImageShow.py b/src/PIL/ImageShow.py
index fc5089423..cd85e81b4 100644
--- a/src/PIL/ImageShow.py
+++ b/src/PIL/ImageShow.py
@@ -31,7 +31,7 @@ def register(viewer, order=1):
         pass  # raised if viewer wasn't a class
     if order > 0:
         _viewers.append(viewer)
-    elif order < 0:
+    else:
         _viewers.insert(0, viewer)
 
 
 

{"src/PIL/ImageShow.py": "#\n# The Python Imaging Library.\n# $Id$\n#\n# im.show() drivers\n#\n# History:\n# 2008-04-06 fl   Created\n#\n# Copyright (c) Secret Labs AB 2008.\n#\n# See the README file for information on usage and redistribution.\n#\nimport os\nimport shutil\nimport subprocess\nimport sys\nimport tempfile\nfrom shlex import quote\n\nfrom PIL import Image\n\n_viewers = []\n\n\ndef register(viewer, order=1):\n    try:\n        if issubclass(viewer, Viewer):\n            viewer = viewer()\n    except TypeError:\n        pass  # raised if viewer wasn't a class\n    if order > 0:\n        _viewers.append(viewer)\n    elif order < 0:\n        _viewers.insert(0, viewer)\n\n\ndef show(image, title=None, **options):\n    r\"\"\"\n    Display a given image.\n\n    :param image: An image object.\n    :param title: Optional title.  Not all viewers can display the title.\n    :param \\**options: Additional viewer options.\n    :returns: True if a suitable viewer was found, false otherwise.\n    \"\"\"\n    for viewer in _viewers:\n        if viewer.show(image, title=title, **options):\n            return 1\n    return 0\n\n\nclass Viewer:\n    \"\"\"Base class for viewers.\"\"\"\n\n    # main api\n\n    def show(self, image, **options):\n\n        # save temporary image to disk\n        if not (\n            image.mode in (\"1\", \"RGBA\") or (self.format == \"PNG\" and image.mode == \"LA\")\n        ):\n            base = Image.getmodebase(image.mode)\n            if image.mode != base:\n                image = image.convert(base)\n\n        return self.show_image(image, **options)\n\n    # hook methods\n\n    format = None\n    options = {}\n\n    def get_format(self, image):\n        \"\"\"Return format name, or None to save as PGM/PPM\"\"\"\n        return self.format\n\n    def get_command(self, file, **options):\n        raise NotImplementedError\n\n    def save_image(self, image):\n        \"\"\"Save to temporary file, and return filename\"\"\"\n        return image._dump(format=self.get_format(image), **self.options)\n\n    def show_image(self, image, **options):\n        \"\"\"Display given image\"\"\"\n        return self.show_file(self.save_image(image), **options)\n\n    def show_file(self, file, **options):\n        \"\"\"Display given file\"\"\"\n        os.system(self.get_command(file, **options))\n        return 1\n\n\n# --------------------------------------------------------------------\n\n\nif sys.platform == \"win32\":\n\n    class WindowsViewer(Viewer):\n        format = \"PNG\"\n        options = {\"compress_level\": 1}\n\n        def get_command(self, file, **options):\n            return (\n                'start \"Pillow\" /WAIT \"%s\" '\n                \"&& ping -n 2 127.0.0.1 >NUL \"\n                '&& del /f \"%s\"' % (file, file)\n            )\n\n    register(WindowsViewer)\n\nelif sys.platform == \"darwin\":\n\n    class MacViewer(Viewer):\n        format = \"PNG\"\n        options = {\"compress_level\": 1}\n\n        def get_command(self, file, **options):\n            # on darwin open returns immediately resulting in the temp\n            # file removal while app is opening\n            command = \"open -a Preview.app\"\n            command = \"({} {}; sleep 20; rm -f {})&\".format(\n                command, quote(file), quote(file)\n            )\n            return command\n\n        def show_file(self, file, **options):\n            \"\"\"Display given file\"\"\"\n            fd, path = tempfile.mkstemp()\n            with os.fdopen(fd, \"w\") as f:\n                f.write(file)\n            with open(path, \"r\") as f:\n                subprocess.Popen(\n                    [\"im=$(cat); open -a Preview.app $im; sleep 20; rm -f $im\"],\n                    shell=True,\n                    stdin=f,\n                )\n            os.remove(path)\n            return 1\n\n    register(MacViewer)\n\nelse:\n\n    # unixoids\n\n    class UnixViewer(Viewer):\n        format = \"PNG\"\n        options = {\"compress_level\": 1}\n\n        def get_command(self, file, **options):\n            command = self.get_command_ex(file, **options)[0]\n            return \"({} {}; rm -f {})&\".format(command, quote(file), quote(file))\n\n        def show_file(self, file, **options):\n            \"\"\"Display given file\"\"\"\n            fd, path = tempfile.mkstemp()\n            with os.fdopen(fd, \"w\") as f:\n                f.write(file)\n            with open(path, \"r\") as f:\n                command = self.get_command_ex(file, **options)[0]\n                subprocess.Popen(\n                    [\"im=$(cat);\" + command + \" $im; rm -f $im\"], shell=True, stdin=f\n                )\n            os.remove(path)\n            return 1\n\n    # implementations\n\n    class DisplayViewer(UnixViewer):\n        def get_command_ex(self, file, **options):\n            command = executable = \"display\"\n            return command, executable\n\n    if shutil.which(\"display\"):\n        register(DisplayViewer)\n\n    class EogViewer(UnixViewer):\n        def get_command_ex(self, file, **options):\n            command = executable = \"eog\"\n            return command, executable\n\n    if shutil.which(\"eog\"):\n        register(EogViewer)\n\n    class XVViewer(UnixViewer):\n        def get_command_ex(self, file, title=None, **options):\n            # note: xv is pretty outdated.  most modern systems have\n            # imagemagick's display command instead.\n            command = executable = \"xv\"\n            if title:\n                command += \" -name %s\" % quote(title)\n            return command, executable\n\n    if shutil.which(\"xv\"):\n        register(XVViewer)\n\nif __name__ == \"__main__\":\n\n    if len(sys.argv) < 2:\n        print(\"Syntax: python ImageShow.py imagefile [title]\")\n        sys.exit()\n\n    with Image.open(sys.argv[1]) as im:\n        print(show(im, *sys.argv[2:]))\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:** Viewer Registered with Order 0 Is Ignored, Preventing Image Display

**Description**
When registering a viewer with an order value of `0`, the viewer is not added to the list of active viewers. This causes image display functions to fail in invoking the viewer's `show_image` method.

**Example Code:**
```python
class TestViewer(ImageShow.Viewer):
    def show_image(self, image, **options):
        self.method_called = True
        return True

viewer = TestViewer()
ImageShow.register(viewer, order=0)

# Attempt to display an image
ImageShow.show(some_image)
```
In this example, `viewer.method_called` remains `False` because the viewer was not properly registered.

**Expected Behavior**
Viewers registered with an order of `0` should be added to the viewers list and their `show_image` method should be called when attempting to display an image.

**Actual Behavior**
Viewers registered with an order of `0` are ignored, resulting in their `show_image` method not being called. Consequently, image display does not utilize the intended viewer and fails to show the image as expected.
[/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/ImageShow.py
#
# The Python Imaging Library.
# $Id$
#
# im.show() drivers
#
# History:
# 2008-04-06 fl   Created
#
# Copyright (c) Secret Labs AB 2008.
#
# See the README file for information on usage and redistribution.
#
import os
import shutil
import subprocess
import sys
import tempfile
from shlex import quote

from PIL import Image

_viewers = []


def register(viewer, order=1):
    try:
        if issubclass(viewer, Viewer):
            viewer = viewer()
    except TypeError:
        pass  # raised if viewer wasn't a class
    if order > 0:
        _viewers.append(viewer)
    elif order < 0:
        _viewers.insert(0, viewer)


def show(image, title=None, **options):
    r"""
    Display a given image.

    :param image: An image object.
    :param title: Optional title.  Not all viewers can display the title.
    :param \**options: Additional viewer options.
    :returns: True if a suitable viewer was found, false otherwise.
    """
    for viewer in _viewers:
        if viewer.show(image, title=title, **options):
            return 1
    return 0


class Viewer:
    """Base class for viewers."""

    # main api

    def show(self, image, **options):

        # save temporary image to disk
        if not (
            image.mode in ("1", "RGBA") or (self.format == "PNG" and image.mode == "LA")
        ):
            base = Image.getmodebase(image.mode)
            if image.mode != base:
                image = image.convert(base)

        return self.show_image(image, **options)

    # hook methods

    format = None
    options = {}

    def get_format(self, image):
        """Return format name, or None to save as PGM/PPM"""
        return self.format

    def get_command(self, file, **options):
        raise NotImplementedError

    def save_image(self, image):
        """Save to temporary file, and return filename"""
        return image._dump(format=self.get_format(image), **self.options)

    def show_image(self, image, **options):
        """Display given image"""
        return self.show_file(self.save_image(image), **options)

    def show_file(self, file, **options):
        """Display given file"""
        os.system(self.get_command(file, **options))
        return 1


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


if sys.platform == "win32":

    class WindowsViewer(Viewer):
        format = "PNG"
        options = {"compress_level": 1}

        def get_command(self, file, **options):
            return (
                'start "Pillow" /WAIT "%s" '
                "&& ping -n 2 127.0.0.1 >NUL "
                '&& del /f "%s"' % (file, file)
            )

    register(WindowsViewer)

elif sys.platform == "darwin":

    class MacViewer(Viewer):
        format = "PNG"
        options = {"compress_level": 1}

        def get_command(self, file, **options):
            # on darwin open returns immediately resulting in the temp
            # file removal while app is opening
            command = "open -a Preview.app"
            command = "({} {}; sleep 20; rm -f {})&".format(
                command, quote(file), quote(file)
            )
            return command

        def show_file(self, file, **options):
            """Display given file"""
            fd, path = tempfile.mkstemp()
            with os.fdopen(fd, "w") as f:
                f.write(file)
            with open(path, "r") as f:
                subprocess.Popen(
                    ["im=$(cat); open -a Preview.app $im; sleep 20; rm -f $im"],
                    shell=True,
                    stdin=f,
                )
            os.remove(path)
            return 1

    register(MacViewer)

else:

    # unixoids

    class UnixViewer(Viewer):
        format = "PNG"
        options = {"compress_level": 1}

        def get_command(self, file, **options):
            command = self.get_command_ex(file, **options)[0]
            return "({} {}; rm -f {})&".format(command, quote(file), quote(file))

        def show_file(self, file, **options):
            """Display given file"""
            fd, path = tempfile.mkstemp()
            with os.fdopen(fd, "w") as f:
                f.write(file)
            with open(path, "r") as f:
                command = self.get_command_ex(file, **options)[0]
                subprocess.Popen(
                    ["im=$(cat);" + command + " $im; rm -f $im"], shell=True, stdin=f
                )
            os.remove(path)
            return 1

    # implementations

    class DisplayViewer(UnixViewer):
        def get_command_ex(self, file, **options):
            command = executable = "display"
            return command, executable

    if shutil.which("display"):
        register(DisplayViewer)

    class EogViewer(UnixViewer):
        def get_command_ex(self, file, **options):
            command = executable = "eog"
            return command, executable

    if shutil.which("eog"):
        register(EogViewer)

    class XVViewer(UnixViewer):
        def get_command_ex(self, file, title=None, **options):
            # note: xv is pretty outdated.  most modern systems have
            # imagemagick's display command instead.
            command = executable = "xv"
            if title:
                command += " -name %s" % quote(title)
            return command, executable

    if shutil.which("xv"):
        register(XVViewer)

if __name__ == "__main__":

    if len(sys.argv) < 2:
        print("Syntax: python ImageShow.py imagefile [title]")
        sys.exit()

    with Image.open(sys.argv[1]) as im:
        print(show(im, *sys.argv[2:]))

```
--- 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