We are currently solving the following issue within our repository. Here is the issue text:
--- BEGIN ISSUE ---
setuptools 8.0.0 or later is now required for PEP 440 version support
python 2.7.9
setuptools 5.5.1
```
Traceback (most recent call last):
  File "version_template.py", line 137, in <module>
    _main()
  File "version_template.py", line 133, in _main
    sys.stdout.write(expand_(*sys.argv[1:]))
  File "version_template.py", line 128, in expand_
    return resolve(name)
  File "version_template.py", line 122, in resolve
    v = v()
  File "version_template.py", line 61, in distVersion
    if build_number is not None and parse_version(baseVersion).is_prerelease:
AttributeError: 'tuple' object has no attribute 'is_prerelease'
```

setuptools 8.0.0 or later is now required for PEP 440 version support
python 2.7.9
setuptools 5.5.1
```
Traceback (most recent call last):
  File "version_template.py", line 137, in <module>
    _main()
  File "version_template.py", line 133, in _main
    sys.stdout.write(expand_(*sys.argv[1:]))
  File "version_template.py", line 128, in expand_
    return resolve(name)
  File "version_template.py", line 122, in resolve
    v = v()
  File "version_template.py", line 61, in distVersion
    if build_number is not None and parse_version(baseVersion).is_prerelease:
AttributeError: 'tuple' object has no attribute 'is_prerelease'
```


--- END ISSUE ---

Below are some code segments, each from a relevant file. One or more of these files may contain bugs.
--- BEGIN FILES ---
Path: `version_template.py`
Content:
```
1 # Copyright (C) 2015-2016 Regents of the University of California
2 #
3 # Licensed under the Apache License, Version 2.0 (the "License");
4 # you may not use this file except in compliance with the License.
5 # You may obtain a copy of the License at
6 #
7 #     http://www.apache.org/licenses/LICENSE-2.0
8 #
9 # Unless required by applicable law or agreed to in writing, software
10 # distributed under the License is distributed on an "AS IS" BASIS,
11 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 # See the License for the specific language governing permissions and
13 # limitations under the License.
14 
15 """This script is a template for src/toil/version.py. Running it without arguments echoes all
16 globals, i.e. module attributes. Constant assignments will be echoed verbatim while callables
17 will be invoked and their result echoed as an assignment using the function name as the left-hand
18 side and the return value of the function as right-hand side. To prevent a module attribute from
19 being echoed, start or end the attribute name with an underscore. To print the value of a single
20 symbol, pass the name of that attribute to the script as a command line argument. You can also
21 import the expand_ function and invoke it directly with either no or exactly one argument."""
22 
23 # Note to maintainers:
24 #
25 #  - don't import at module level unless you intend for the import to be included in the output
26 #  - only import from the Python standard run-time library (you can't have any dependencies)
27 
28 baseVersion = '3.5.0a1'
29 
30 cgcloudVersion = '1.6.0a1.dev378'
31 
32 
33 def version():
34     """
35     A version identifier that includes the full-legth commit SHA1 and an optional suffix to
36     indicate that the working copy is dirty.
37     """
38     return _version()
39 
40 
41 def shortVersion():
42     """
43     A version identifier that includes the abbreviated commit SHA1 and an optional suffix to
44     indicate that the working copy is dirty.
45     """
46     return _version(shorten=True)
47 
48 
49 def _version(shorten=False):
50     return '-'.join(filter(None, [distVersion(),
51                                   currentCommit()[:7 if shorten else None],
52                                   ('dirty' if dirty() else None)]))
53 
54 
55 def distVersion():
56     """
57     The distribution version identifying a published release on PyPI.
58     """
59     from pkg_resources import parse_version
60     build_number = buildNumber()
61     if build_number is not None and parse_version(baseVersion).is_prerelease:
62         return baseVersion + '.dev' + build_number
63     else:
64         return baseVersion
65 
66 
67 def dockerTag():
68     """
69     The primary tag of the Docker image for the appliance. This uniquely identifies the appliance
70     image.
71     """
72     return version()
73 
74 
75 def dockerShortTag():
76     """
77     A secondary, shortened form of :func:`dockerTag` with which to tag the appliance image for
78     convenience.
79     """
80     return shortVersion()
81 
82 
83 def dockerMinimalTag():
84     """
85     A minimal tag with which to tag the appliance image for convenience. Does not include
86     information about the git commit or working copy dirtyness.
87     """
88     return distVersion()
89 
90 
91 dockerRegistry = 'quay.io/ucsc_cgl'
92 
93 dockerName = 'toil'
94 
95 
96 def buildNumber():
97     """
98     The Jenkins build number, if defined, else None.
99     """
100     import os
101     return os.getenv('BUILD_NUMBER')
102 
103 
104 def currentCommit():
105     from subprocess import check_output
106     return check_output('git log --pretty=oneline -n 1 -- $(pwd)', shell=True).split()[0]
107 
108 
109 def dirty():
110     from subprocess import call
111     return 0 != call('(git diff --exit-code '
112                      '&& git diff --cached --exit-code) > /dev/null', shell=True)
113 
114 
115 def expand_(name=None):
116     variables = {k: v for k, v in globals().iteritems()
117                  if not k.startswith('_') and not k.endswith('_')}
118 
119     def resolve(k):
120         v = variables[k]
121         if callable(v):
122             v = v()
123         return v
124 
125     if name is None:
126         return ''.join("%s = %s\n" % (k, repr(resolve(k))) for k, v in variables.iteritems())
127     else:
128         return resolve(name)
129 
130 
131 def _main():
132     import sys
133     sys.stdout.write(expand_(*sys.argv[1:]))
134 
135 
136 if __name__ == '__main__':
137     _main()
138
```
--- END FILES ---

Please first localize the bug based on the issue statement, and then generate a patch according to the `git diff` format fenced by three backticks.

Here is an example:

```diff
diff --git a/examples/server_async.py b/examples/server_async.py
--- a/examples/server_async.py
+++ b/examples/server_async.py
@@ -313,4 +313,4 @@
 
 
 if __name__ == "__main__":
-    asyncio.run(run_async_server("."), debug=True)
+    asyncio.run(run_async_server(), debug=True)
diff --git a/examples/server_sync.py b/examples/server_sync.py
--- a/examples/server_sync.py
+++ b/examples/server_sync.py
@@ -313,5 +313,5 @@
 
 
 if __name__ == "__main__":
-    server = run_sync_server(".")
+    server = run_sync_server()
     server.shutdown()

```

diff --git a/version_template.py b/version_template.py
--- a/version_template.py
+++ b/version_template.py
@@ -22,7 +22,7 @@
 
 # Note to maintainers:
 #
-#  - don't import at module level unless you intend for the import to be included in the output
+#  - don't import at module level unless you want the imported value to be included in the output
 #  - only import from the Python standard run-time library (you can't have any dependencies)
 
 baseVersion = '3.5.0a1'
@@ -58,7 +58,12 @@
     """
     from pkg_resources import parse_version
     build_number = buildNumber()
-    if build_number is not None and parse_version(baseVersion).is_prerelease:
+    parsedBaseVersion = parse_version(baseVersion)
+    if isinstance(parsedBaseVersion, tuple):
+        raise RuntimeError("Setuptools version 8.0 or newer required. Update by running "
+                           "'pip install setuptools --upgrade'")
+
+    if build_number is not None and parsedBaseVersion.is_prerelease:
         return baseVersion + '.dev' + build_number
     else:
         return baseVersion

{"golden_diff": "diff --git a/version_template.py b/version_template.py\n--- a/version_template.py\n+++ b/version_template.py\n@@ -22,7 +22,7 @@\n \n # Note to maintainers:\n #\n-#  - don't import at module level unless you intend for the import to be included in the output\n+#  - don't import at module level unless you want the imported value to be included in the output\n #  - only import from the Python standard run-time library (you can't have any dependencies)\n \n baseVersion = '3.5.0a1'\n@@ -58,7 +58,12 @@\n     \"\"\"\n     from pkg_resources import parse_version\n     build_number = buildNumber()\n-    if build_number is not None and parse_version(baseVersion).is_prerelease:\n+    parsedBaseVersion = parse_version(baseVersion)\n+    if isinstance(parsedBaseVersion, tuple):\n+        raise RuntimeError(\"Setuptools version 8.0 or newer required. Update by running \"\n+                           \"'pip install setuptools --upgrade'\")\n+\n+    if build_number is not None and parsedBaseVersion.is_prerelease:\n         return baseVersion + '.dev' + build_number\n     else:\n         return baseVersion\n", "issue": "setuptools 8.0.0 or later is now required for PEP 440 version support\npython 2.7.9\r\nsetuptools 5.5.1\r\n```\r\nTraceback (most recent call last):\r\n  File \"version_template.py\", line 137, in <module>\r\n    _main()\r\n  File \"version_template.py\", line 133, in _main\r\n    sys.stdout.write(expand_(*sys.argv[1:]))\r\n  File \"version_template.py\", line 128, in expand_\r\n    return resolve(name)\r\n  File \"version_template.py\", line 122, in resolve\r\n    v = v()\r\n  File \"version_template.py\", line 61, in distVersion\r\n    if build_number is not None and parse_version(baseVersion).is_prerelease:\r\nAttributeError: 'tuple' object has no attribute 'is_prerelease'\r\n```\r\n\nsetuptools 8.0.0 or later is now required for PEP 440 version support\npython 2.7.9\r\nsetuptools 5.5.1\r\n```\r\nTraceback (most recent call last):\r\n  File \"version_template.py\", line 137, in <module>\r\n    _main()\r\n  File \"version_template.py\", line 133, in _main\r\n    sys.stdout.write(expand_(*sys.argv[1:]))\r\n  File \"version_template.py\", line 128, in expand_\r\n    return resolve(name)\r\n  File \"version_template.py\", line 122, in resolve\r\n    v = v()\r\n  File \"version_template.py\", line 61, in distVersion\r\n    if build_number is not None and parse_version(baseVersion).is_prerelease:\r\nAttributeError: 'tuple' object has no attribute 'is_prerelease'\r\n```\r\n\n", "before_files": [{"content": "# Copyright (C) 2015-2016 Regents of the University of California\n#\n# Licensed under the Apache License, Version 2.0 (the \"License\");\n# you may not use this file except in compliance with the License.\n# You may obtain a copy of the License at\n#\n#     http://www.apache.org/licenses/LICENSE-2.0\n#\n# Unless required by applicable law or agreed to in writing, software\n# distributed under the License is distributed on an \"AS IS\" BASIS,\n# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n# See the License for the specific language governing permissions and\n# limitations under the License.\n\n\"\"\"This script is a template for src/toil/version.py. Running it without arguments echoes all\nglobals, i.e. module attributes. Constant assignments will be echoed verbatim while callables\nwill be invoked and their result echoed as an assignment using the function name as the left-hand\nside and the return value of the function as right-hand side. To prevent a module attribute from\nbeing echoed, start or end the attribute name with an underscore. To print the value of a single\nsymbol, pass the name of that attribute to the script as a command line argument. You can also\nimport the expand_ function and invoke it directly with either no or exactly one argument.\"\"\"\n\n# Note to maintainers:\n#\n#  - don't import at module level unless you intend for the import to be included in the output\n#  - only import from the Python standard run-time library (you can't have any dependencies)\n\nbaseVersion = '3.5.0a1'\n\ncgcloudVersion = '1.6.0a1.dev378'\n\n\ndef version():\n    \"\"\"\n    A version identifier that includes the full-legth commit SHA1 and an optional suffix to\n    indicate that the working copy is dirty.\n    \"\"\"\n    return _version()\n\n\ndef shortVersion():\n    \"\"\"\n    A version identifier that includes the abbreviated commit SHA1 and an optional suffix to\n    indicate that the working copy is dirty.\n    \"\"\"\n    return _version(shorten=True)\n\n\ndef _version(shorten=False):\n    return '-'.join(filter(None, [distVersion(),\n                                  currentCommit()[:7 if shorten else None],\n                                  ('dirty' if dirty() else None)]))\n\n\ndef distVersion():\n    \"\"\"\n    The distribution version identifying a published release on PyPI.\n    \"\"\"\n    from pkg_resources import parse_version\n    build_number = buildNumber()\n    if build_number is not None and parse_version(baseVersion).is_prerelease:\n        return baseVersion + '.dev' + build_number\n    else:\n        return baseVersion\n\n\ndef dockerTag():\n    \"\"\"\n    The primary tag of the Docker image for the appliance. This uniquely identifies the appliance\n    image.\n    \"\"\"\n    return version()\n\n\ndef dockerShortTag():\n    \"\"\"\n    A secondary, shortened form of :func:`dockerTag` with which to tag the appliance image for\n    convenience.\n    \"\"\"\n    return shortVersion()\n\n\ndef dockerMinimalTag():\n    \"\"\"\n    A minimal tag with which to tag the appliance image for convenience. Does not include\n    information about the git commit or working copy dirtyness.\n    \"\"\"\n    return distVersion()\n\n\ndockerRegistry = 'quay.io/ucsc_cgl'\n\ndockerName = 'toil'\n\n\ndef buildNumber():\n    \"\"\"\n    The Jenkins build number, if defined, else None.\n    \"\"\"\n    import os\n    return os.getenv('BUILD_NUMBER')\n\n\ndef currentCommit():\n    from subprocess import check_output\n    return check_output('git log --pretty=oneline -n 1 -- $(pwd)', shell=True).split()[0]\n\n\ndef dirty():\n    from subprocess import call\n    return 0 != call('(git diff --exit-code '\n                     '&& git diff --cached --exit-code) > /dev/null', shell=True)\n\n\ndef expand_(name=None):\n    variables = {k: v for k, v in globals().iteritems()\n                 if not k.startswith('_') and not k.endswith('_')}\n\n    def resolve(k):\n        v = variables[k]\n        if callable(v):\n            v = v()\n        return v\n\n    if name is None:\n        return ''.join(\"%s = %s\\n\" % (k, repr(resolve(k))) for k, v in variables.iteritems())\n    else:\n        return resolve(name)\n\n\ndef _main():\n    import sys\n    sys.stdout.write(expand_(*sys.argv[1:]))\n\n\nif __name__ == '__main__':\n    _main()\n", "path": "version_template.py"}], "after_files": [{"content": "# Copyright (C) 2015-2016 Regents of the University of California\n#\n# Licensed under the Apache License, Version 2.0 (the \"License\");\n# you may not use this file except in compliance with the License.\n# You may obtain a copy of the License at\n#\n#     http://www.apache.org/licenses/LICENSE-2.0\n#\n# Unless required by applicable law or agreed to in writing, software\n# distributed under the License is distributed on an \"AS IS\" BASIS,\n# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n# See the License for the specific language governing permissions and\n# limitations under the License.\n\n\"\"\"This script is a template for src/toil/version.py. Running it without arguments echoes all\nglobals, i.e. module attributes. Constant assignments will be echoed verbatim while callables\nwill be invoked and their result echoed as an assignment using the function name as the left-hand\nside and the return value of the function as right-hand side. To prevent a module attribute from\nbeing echoed, start or end the attribute name with an underscore. To print the value of a single\nsymbol, pass the name of that attribute to the script as a command line argument. You can also\nimport the expand_ function and invoke it directly with either no or exactly one argument.\"\"\"\n\n# Note to maintainers:\n#\n#  - don't import at module level unless you want the imported value to be included in the output\n#  - only import from the Python standard run-time library (you can't have any dependencies)\n\nbaseVersion = '3.5.0a1'\n\ncgcloudVersion = '1.6.0a1.dev378'\n\n\ndef version():\n    \"\"\"\n    A version identifier that includes the full-legth commit SHA1 and an optional suffix to\n    indicate that the working copy is dirty.\n    \"\"\"\n    return _version()\n\n\ndef shortVersion():\n    \"\"\"\n    A version identifier that includes the abbreviated commit SHA1 and an optional suffix to\n    indicate that the working copy is dirty.\n    \"\"\"\n    return _version(shorten=True)\n\n\ndef _version(shorten=False):\n    return '-'.join(filter(None, [distVersion(),\n                                  currentCommit()[:7 if shorten else None],\n                                  ('dirty' if dirty() else None)]))\n\n\ndef distVersion():\n    \"\"\"\n    The distribution version identifying a published release on PyPI.\n    \"\"\"\n    from pkg_resources import parse_version\n    build_number = buildNumber()\n    parsedBaseVersion = parse_version(baseVersion)\n    if isinstance(parsedBaseVersion, tuple):\n        raise RuntimeError(\"Setuptools version 8.0 or newer required. Update by running \"\n                           \"'pip install setuptools --upgrade'\")\n\n    if build_number is not None and parsedBaseVersion.is_prerelease:\n        return baseVersion + '.dev' + build_number\n    else:\n        return baseVersion\n\n\ndef dockerTag():\n    \"\"\"\n    The primary tag of the Docker image for the appliance. This uniquely identifies the appliance\n    image.\n    \"\"\"\n    return version()\n\n\ndef dockerShortTag():\n    \"\"\"\n    A secondary, shortened form of :func:`dockerTag` with which to tag the appliance image for\n    convenience.\n    \"\"\"\n    return shortVersion()\n\n\ndef dockerMinimalTag():\n    \"\"\"\n    A minimal tag with which to tag the appliance image for convenience. Does not include\n    information about the git commit or working copy dirtyness.\n    \"\"\"\n    return distVersion()\n\n\ndockerRegistry = 'quay.io/ucsc_cgl'\n\ndockerName = 'toil'\n\n\ndef buildNumber():\n    \"\"\"\n    The Jenkins build number, if defined, else None.\n    \"\"\"\n    import os\n    return os.getenv('BUILD_NUMBER')\n\n\ndef currentCommit():\n    from subprocess import check_output\n    return check_output('git log --pretty=oneline -n 1 -- $(pwd)', shell=True).split()[0]\n\n\ndef dirty():\n    from subprocess import call\n    return 0 != call('(git diff --exit-code '\n                     '&& git diff --cached --exit-code) > /dev/null', shell=True)\n\n\ndef expand_(name=None):\n    variables = {k: v for k, v in globals().iteritems()\n                 if not k.startswith('_') and not k.endswith('_')}\n\n    def resolve(k):\n        v = variables[k]\n        if callable(v):\n            v = v()\n        return v\n\n    if name is None:\n        return ''.join(\"%s = %s\\n\" % (k, repr(resolve(k))) for k, v in variables.iteritems())\n    else:\n        return resolve(name)\n\n\ndef _main():\n    import sys\n    sys.stdout.write(expand_(*sys.argv[1:]))\n\n\nif __name__ == '__main__':\n    _main()\n", "path": "version_template.py"}]}