old_contents: #!/usr/bin/env python3
  
  from sphinx.ext.intersphinx import fetch_inventory
  
  URL = "https://docs.python.org/{}/objects.inv"
  PATH = "isort/stdlibs/py{}.py"
  VERSIONS = [("2", "7"), ("3", "5"), ("3", "6"), ("3", "7"), ("3", "8")]
  
  DOCSTRING = """
  File contains the standard library of Python {}.
  
  DO NOT EDIT. If the standard library changes, a new list should be created
  using the mkstdlibs.py script.
  """
  
  
  class FakeConfig:
      intersphinx_timeout = None
      tls_verify = True
  
  
  class FakeApp:
      srcdir = ""
      config = FakeConfig()
  
  
  for version_info in VERSIONS:
      version = ".".join(version_info)
      url = URL.format(version)
      invdata = fetch_inventory(FakeApp(), "", url)
  
      modules = set()
      for module in invdata["py:module"]:
          root, *_ = module.split(".")
          if root not in ["__future__", "__main__"]:
              modules.add(root)
  
      path = PATH.format("".join(version_info))
      with open(path, "w") as stdlib_file:
          docstring = DOCSTRING.format(version)
          stdlib_file.write(f'"""{docstring}"""\n\n')
          stdlib_file.write("stdlib = {\n")
          for module in sorted(modules):
              stdlib_file.write(f'    "{module}",\n')
          stdlib_file.write("}\n")
  
new_contents: #!/usr/bin/env python3
  
  from sphinx.ext.intersphinx import fetch_inventory
  
  URL = "https://docs.python.org/{}/objects.inv"
  PATH = "isort/stdlibs/py{}.py"
  VERSIONS = [("2", "7"), ("3", "5"), ("3", "6"), ("3", "7"), ("3", "8"), ("3", "9")]
  
  DOCSTRING = """
  File contains the standard library of Python {}.
  
  DO NOT EDIT. If the standard library changes, a new list should be created
  using the mkstdlibs.py script.
  """
  
  
  class FakeConfig:
      intersphinx_timeout = None
      tls_verify = True
      user_agent = ""
  
  
  class FakeApp:
      srcdir = ""
      config = FakeConfig()
  
  
  for version_info in VERSIONS:
      version = ".".join(version_info)
      url = URL.format(version)
      invdata = fetch_inventory(FakeApp(), "", url)
  
      modules = set()
      for module in invdata["py:module"]:
          root, *_ = module.split(".")
          if root not in ["__future__", "__main__"]:
              modules.add(root)
  
      path = PATH.format("".join(version_info))
      with open(path, "w") as stdlib_file:
          docstring = DOCSTRING.format(version)
          stdlib_file.write(f'"""{docstring}"""\n\n')
          stdlib_file.write("stdlib = {\n")
          for module in sorted(modules):
              stdlib_file.write(f'    "{module}",\n')
          stdlib_file.write("}\n")
  
subject: Update script to include empty user agent