We are currently solving the following issue within our repository. Here is the issue text:
--- BEGIN ISSUE ---
Pyomo.environ doesn't initialize when called by cython
See full details on stack overflow:
https://stackoverflow.com/questions/71902579/pyomo-doesnt-load-when-called-via-cython

Also see
 https://github.com/Pyomo/pyomo/issues/2374#issuecomment-1115424111_ :

"...(The linked question is probably either a problem with how the pyomo driver script interacts with argparse [it really shouldn't be doing that much when pyomo.environ is imported - that is almost certainly a bug], or with how cython and argparse interact)."

_Originally posted by @jsiirola in https://github.com/Pyomo/pyomo/issues/2374#issuecomment-1115424111_

--- END ISSUE ---

Below are some code segments, each from a relevant file. One or more of these files may contain bugs.
--- BEGIN FILES ---
Path: `pyomo/scripting/pyomo_parser.py`
Content:
```
1 #  ___________________________________________________________________________
2 #
3 #  Pyomo: Python Optimization Modeling Objects
4 #  Copyright (c) 2008-2022
5 #  National Technology and Engineering Solutions of Sandia, LLC
6 #  Under the terms of Contract DE-NA0003525 with National Technology and
7 #  Engineering Solutions of Sandia, LLC, the U.S. Government retains certain
8 #  rights in this software.
9 #  This software is distributed under the 3-clause BSD License.
10 #  ___________________________________________________________________________
11 
12 __all__ = ['add_subparser', 'get_parser', 'subparsers']
13 
14 import argparse
15 import sys
16 
17 #
18 # Sort sub_parser names, since these are inserted throughout Pyomo
19 #
20 # NOTE: This may not be robust to different versions of argparse.  We're
21 # mucking with a non-public API here ...
22 #
23 class CustomHelpFormatter(argparse.RawDescriptionHelpFormatter):
24 
25     def _metavar_formatter(self, action, default_metavar):
26         if action.metavar is not None:
27             result = action.metavar
28         elif action.choices is not None:
29             choice_strs = sorted(str(choice) for choice in action.choices)
30             result = '{%s}' % ','.join(choice_strs)
31         else:
32             result = default_metavar
33 
34         def format(tuple_size):
35             if isinstance(result, tuple):
36                 return result
37             else:
38                 return (result, ) * tuple_size
39         return format
40 
41     def _iter_indented_subactions(self, action):
42         try:
43             get_subactions = action._get_subactions
44         except AttributeError:
45             pass
46         else:
47             self._indent()
48             if isinstance(action, argparse._SubParsersAction):
49                 for subaction in sorted(get_subactions(), key=lambda x: x.dest):
50                     yield subaction
51             else:
52                 for subaction in get_subactions():
53                     yield subaction
54             self._dedent()
55 
56 
57 def get_version():
58     from pyomo.version import version
59     import platform
60     return "Pyomo %s (%s %s on %s %s)" % (
61             version,
62             platform.python_implementation(),
63             '.'.join( str(x) for x in sys.version_info[:3] ),
64             platform.system(),
65             platform.release() )
66 
67 #
68 # Create the argparse parser for Pyomo
69 #
70 doc="This is the main driver for the Pyomo optimization software."
71 epilog="""
72 -------------------------------------------------------------------------
73 Pyomo supports a variety of modeling and optimization capabilities,
74 which are executed either as subcommands of 'pyomo' or as separate
75 commands.  Use the 'help' subcommand to get information about the
76 capabilities installed with Pyomo.  Additionally, each subcommand
77 supports independent command-line options.  Use the -h option to
78 print details for a subcommand.  For example, type
79 
80    pyomo solve -h
81 
82 to print information about the `solve` subcommand.
83 """
84 _pyomo_parser = argparse.ArgumentParser(
85     description=doc, epilog=epilog, formatter_class=CustomHelpFormatter )
86 _pyomo_parser.add_argument("--version", action="version", version=get_version())
87 _pyomo_subparsers = _pyomo_parser.add_subparsers(
88     dest='subparser_name', title='subcommands' )
89 
90 subparsers = []
91 
92 def add_subparser(name, **args):
93     """
94     Add a subparser to the 'pyomo' command.
95     """
96     global subparsers
97     func = args.pop('func', None)
98     parser = _pyomo_subparsers.add_parser(name, **args)
99     subparsers.append(name)
100     if func is not None:
101         parser.set_defaults(func=func)
102     return parser
103 
104 def get_parser():
105     """
106     Return the parser used by the 'pyomo' commmand.
107     """
108     return _pyomo_parser
109 
110
```
--- 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/pyomo/scripting/pyomo_parser.py b/pyomo/scripting/pyomo_parser.py
--- a/pyomo/scripting/pyomo_parser.py
+++ b/pyomo/scripting/pyomo_parser.py
@@ -81,11 +81,8 @@
 
 to print information about the `solve` subcommand.
 """
-_pyomo_parser = argparse.ArgumentParser(
-    description=doc, epilog=epilog, formatter_class=CustomHelpFormatter )
-_pyomo_parser.add_argument("--version", action="version", version=get_version())
-_pyomo_subparsers = _pyomo_parser.add_subparsers(
-    dest='subparser_name', title='subcommands' )
+_pyomo_parser = None
+_pyomo_subparsers = None
 
 subparsers = []
 
@@ -93,7 +90,9 @@
     """
     Add a subparser to the 'pyomo' command.
     """
-    global subparsers
+    if _pyomo_subparsers is None:
+        get_parser()
+
     func = args.pop('func', None)
     parser = _pyomo_subparsers.add_parser(name, **args)
     subparsers.append(name)
@@ -105,5 +104,16 @@
     """
     Return the parser used by the 'pyomo' commmand.
     """
+    global _pyomo_parser
+    if _pyomo_parser is None:
+        _pyomo_parser = argparse.ArgumentParser(
+            description=doc,
+            epilog=epilog,
+            formatter_class=CustomHelpFormatter
+        )
+        _pyomo_parser.add_argument(
+            "--version", action="version", version=get_version())
+        global _pyomo_subparsers
+        _pyomo_subparsers = _pyomo_parser.add_subparsers(
+            dest='subparser_name', title='subcommands' )
     return _pyomo_parser
-

{"golden_diff": "diff --git a/pyomo/scripting/pyomo_parser.py b/pyomo/scripting/pyomo_parser.py\n--- a/pyomo/scripting/pyomo_parser.py\n+++ b/pyomo/scripting/pyomo_parser.py\n@@ -81,11 +81,8 @@\n \n to print information about the `solve` subcommand.\n \"\"\"\n-_pyomo_parser = argparse.ArgumentParser(\n-    description=doc, epilog=epilog, formatter_class=CustomHelpFormatter )\n-_pyomo_parser.add_argument(\"--version\", action=\"version\", version=get_version())\n-_pyomo_subparsers = _pyomo_parser.add_subparsers(\n-    dest='subparser_name', title='subcommands' )\n+_pyomo_parser = None\n+_pyomo_subparsers = None\n \n subparsers = []\n \n@@ -93,7 +90,9 @@\n     \"\"\"\n     Add a subparser to the 'pyomo' command.\n     \"\"\"\n-    global subparsers\n+    if _pyomo_subparsers is None:\n+        get_parser()\n+\n     func = args.pop('func', None)\n     parser = _pyomo_subparsers.add_parser(name, **args)\n     subparsers.append(name)\n@@ -105,5 +104,16 @@\n     \"\"\"\n     Return the parser used by the 'pyomo' commmand.\n     \"\"\"\n+    global _pyomo_parser\n+    if _pyomo_parser is None:\n+        _pyomo_parser = argparse.ArgumentParser(\n+            description=doc,\n+            epilog=epilog,\n+            formatter_class=CustomHelpFormatter\n+        )\n+        _pyomo_parser.add_argument(\n+            \"--version\", action=\"version\", version=get_version())\n+        global _pyomo_subparsers\n+        _pyomo_subparsers = _pyomo_parser.add_subparsers(\n+            dest='subparser_name', title='subcommands' )\n     return _pyomo_parser\n-\n", "issue": "Pyomo.environ doesn't initialize when called by cython\nSee full details on stack overflow:\r\nhttps://stackoverflow.com/questions/71902579/pyomo-doesnt-load-when-called-via-cython\r\n\r\nAlso see\r\n https://github.com/Pyomo/pyomo/issues/2374#issuecomment-1115424111_ :\r\n\r\n\"...(The linked question is probably either a problem with how the pyomo driver script interacts with argparse [it really shouldn't be doing that much when pyomo.environ is imported - that is almost certainly a bug], or with how cython and argparse interact).\"\r\n\r\n_Originally posted by @jsiirola in https://github.com/Pyomo/pyomo/issues/2374#issuecomment-1115424111_\n", "before_files": [{"content": "#  ___________________________________________________________________________\n#\n#  Pyomo: Python Optimization Modeling Objects\n#  Copyright (c) 2008-2022\n#  National Technology and Engineering Solutions of Sandia, LLC\n#  Under the terms of Contract DE-NA0003525 with National Technology and\n#  Engineering Solutions of Sandia, LLC, the U.S. Government retains certain\n#  rights in this software.\n#  This software is distributed under the 3-clause BSD License.\n#  ___________________________________________________________________________\n\n__all__ = ['add_subparser', 'get_parser', 'subparsers']\n\nimport argparse\nimport sys\n\n#\n# Sort sub_parser names, since these are inserted throughout Pyomo\n#\n# NOTE: This may not be robust to different versions of argparse.  We're\n# mucking with a non-public API here ...\n#\nclass CustomHelpFormatter(argparse.RawDescriptionHelpFormatter):\n\n    def _metavar_formatter(self, action, default_metavar):\n        if action.metavar is not None:\n            result = action.metavar\n        elif action.choices is not None:\n            choice_strs = sorted(str(choice) for choice in action.choices)\n            result = '{%s}' % ','.join(choice_strs)\n        else:\n            result = default_metavar\n\n        def format(tuple_size):\n            if isinstance(result, tuple):\n                return result\n            else:\n                return (result, ) * tuple_size\n        return format\n\n    def _iter_indented_subactions(self, action):\n        try:\n            get_subactions = action._get_subactions\n        except AttributeError:\n            pass\n        else:\n            self._indent()\n            if isinstance(action, argparse._SubParsersAction):\n                for subaction in sorted(get_subactions(), key=lambda x: x.dest):\n                    yield subaction\n            else:\n                for subaction in get_subactions():\n                    yield subaction\n            self._dedent()\n\n\ndef get_version():\n    from pyomo.version import version\n    import platform\n    return \"Pyomo %s (%s %s on %s %s)\" % (\n            version,\n            platform.python_implementation(),\n            '.'.join( str(x) for x in sys.version_info[:3] ),\n            platform.system(),\n            platform.release() )\n\n#\n# Create the argparse parser for Pyomo\n#\ndoc=\"This is the main driver for the Pyomo optimization software.\"\nepilog=\"\"\"\n-------------------------------------------------------------------------\nPyomo supports a variety of modeling and optimization capabilities,\nwhich are executed either as subcommands of 'pyomo' or as separate\ncommands.  Use the 'help' subcommand to get information about the\ncapabilities installed with Pyomo.  Additionally, each subcommand\nsupports independent command-line options.  Use the -h option to\nprint details for a subcommand.  For example, type\n\n   pyomo solve -h\n\nto print information about the `solve` subcommand.\n\"\"\"\n_pyomo_parser = argparse.ArgumentParser(\n    description=doc, epilog=epilog, formatter_class=CustomHelpFormatter )\n_pyomo_parser.add_argument(\"--version\", action=\"version\", version=get_version())\n_pyomo_subparsers = _pyomo_parser.add_subparsers(\n    dest='subparser_name', title='subcommands' )\n\nsubparsers = []\n\ndef add_subparser(name, **args):\n    \"\"\"\n    Add a subparser to the 'pyomo' command.\n    \"\"\"\n    global subparsers\n    func = args.pop('func', None)\n    parser = _pyomo_subparsers.add_parser(name, **args)\n    subparsers.append(name)\n    if func is not None:\n        parser.set_defaults(func=func)\n    return parser\n\ndef get_parser():\n    \"\"\"\n    Return the parser used by the 'pyomo' commmand.\n    \"\"\"\n    return _pyomo_parser\n\n", "path": "pyomo/scripting/pyomo_parser.py"}], "after_files": [{"content": "#  ___________________________________________________________________________\n#\n#  Pyomo: Python Optimization Modeling Objects\n#  Copyright (c) 2008-2022\n#  National Technology and Engineering Solutions of Sandia, LLC\n#  Under the terms of Contract DE-NA0003525 with National Technology and\n#  Engineering Solutions of Sandia, LLC, the U.S. Government retains certain\n#  rights in this software.\n#  This software is distributed under the 3-clause BSD License.\n#  ___________________________________________________________________________\n\n__all__ = ['add_subparser', 'get_parser', 'subparsers']\n\nimport argparse\nimport sys\n\n#\n# Sort sub_parser names, since these are inserted throughout Pyomo\n#\n# NOTE: This may not be robust to different versions of argparse.  We're\n# mucking with a non-public API here ...\n#\nclass CustomHelpFormatter(argparse.RawDescriptionHelpFormatter):\n\n    def _metavar_formatter(self, action, default_metavar):\n        if action.metavar is not None:\n            result = action.metavar\n        elif action.choices is not None:\n            choice_strs = sorted(str(choice) for choice in action.choices)\n            result = '{%s}' % ','.join(choice_strs)\n        else:\n            result = default_metavar\n\n        def format(tuple_size):\n            if isinstance(result, tuple):\n                return result\n            else:\n                return (result, ) * tuple_size\n        return format\n\n    def _iter_indented_subactions(self, action):\n        try:\n            get_subactions = action._get_subactions\n        except AttributeError:\n            pass\n        else:\n            self._indent()\n            if isinstance(action, argparse._SubParsersAction):\n                for subaction in sorted(get_subactions(), key=lambda x: x.dest):\n                    yield subaction\n            else:\n                for subaction in get_subactions():\n                    yield subaction\n            self._dedent()\n\n\ndef get_version():\n    from pyomo.version import version\n    import platform\n    return \"Pyomo %s (%s %s on %s %s)\" % (\n            version,\n            platform.python_implementation(),\n            '.'.join( str(x) for x in sys.version_info[:3] ),\n            platform.system(),\n            platform.release() )\n\n#\n# Create the argparse parser for Pyomo\n#\ndoc=\"This is the main driver for the Pyomo optimization software.\"\nepilog=\"\"\"\n-------------------------------------------------------------------------\nPyomo supports a variety of modeling and optimization capabilities,\nwhich are executed either as subcommands of 'pyomo' or as separate\ncommands.  Use the 'help' subcommand to get information about the\ncapabilities installed with Pyomo.  Additionally, each subcommand\nsupports independent command-line options.  Use the -h option to\nprint details for a subcommand.  For example, type\n\n   pyomo solve -h\n\nto print information about the `solve` subcommand.\n\"\"\"\n_pyomo_parser = None\n_pyomo_subparsers = None\n\nsubparsers = []\n\ndef add_subparser(name, **args):\n    \"\"\"\n    Add a subparser to the 'pyomo' command.\n    \"\"\"\n    if _pyomo_subparsers is None:\n        get_parser()\n\n    func = args.pop('func', None)\n    parser = _pyomo_subparsers.add_parser(name, **args)\n    subparsers.append(name)\n    if func is not None:\n        parser.set_defaults(func=func)\n    return parser\n\ndef get_parser():\n    \"\"\"\n    Return the parser used by the 'pyomo' commmand.\n    \"\"\"\n    global _pyomo_parser\n    if _pyomo_parser is None:\n        _pyomo_parser = argparse.ArgumentParser(\n            description=doc,\n            epilog=epilog,\n            formatter_class=CustomHelpFormatter\n        )\n        _pyomo_parser.add_argument(\n            \"--version\", action=\"version\", version=get_version())\n        global _pyomo_subparsers\n        _pyomo_subparsers = _pyomo_parser.add_subparsers(\n            dest='subparser_name', title='subcommands' )\n    return _pyomo_parser\n", "path": "pyomo/scripting/pyomo_parser.py"}]}