prompt: You will be provided with a partial code base and an issue statement explaining a problem to resolve.
  <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_
  
  </issue>
  <code>
  [start of pyomo/scripting/pyomo_parser.py]
  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 of pyomo/scripting/pyomo_parser.py]
  </code>
  
  I need you to solve this issue by generating a single patch file that I can apply directly to this repository using git apply. Please respond with a single patch file in the following format.
  <patch>
  diff --git a/file.py b/file.py
  --- a/file.py
  +++ b/file.py
  @@ -1,27 +1,35 @@
   def euclidean(a, b):
  -    while b:
  -        a, b = b, a % b
  -    return a
  +    if b == 0:
  +        return a
  +    return euclidean(b, a % b)
   
   
   def bresenham(x0, y0, x1, y1):
       points = []
       dx = abs(x1 - x0)
       dy = abs(y1 - y0)
  -    sx = 1 if x0 < x1 else -1
  -    sy = 1 if y0 < y1 else -1
  -    err = dx - dy
  +    x, y = x0, y0
  +    sx = -1 if x0 > x1 else 1
  +    sy = -1 if y0 > y1 else 1
   
  -    while True:
  -        points.append((x0, y0))
  -        if x0 == x1 and y0 == y1:
  -            break
  -        e2 = 2 * err
  -        if e2 > -dy:
  -            err -= dy
  -            x0 += sx
  -        if e2 < dx:
  -            err += dx
  -            y0 += sy
  +    if dx > dy:
  +        err = dx / 2.0
  +        while x != x1:
  +            points.append((x, y))
  +            err -= dy
  +            if err < 0:
  +                y += sy
  +                err += dx
  +            x += sx
  +    else:
  +        err = dy / 2.0
  +        while y != y1:
  +            points.append((x, y))
  +            err -= dx
  +            if err < 0:
  +                x += sx
  +                err += dy
  +            y += sy
  +
  +    points.append((x, y))
       return points
  
  </patch>
golden_diff: 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
  -
  
verification_info: {"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"}]}