code: def get_local_directory_dist(self):
          
  
          if not os.path.isdir(self.path):
              return
  
          log.info('Attempting to import astropy_helpers from {0} {1!r}'.format(
                   'submodule' if self.is_submodule else 'directory',
                   self.path))
  
          dist = self._directory_import()
  
          if dist is None:
              log.warn(
                  'The requested path {0!r} for importing {1} does not '
                  'exist, or does not contain a copy of the {1} '
                  'package.'.format(self.path, PACKAGE_NAME))
          elif self.auto_upgrade and not self.is_submodule:
              # A version of astropy-helpers was found on the available path, but
              # check to see if a bugfix release is available on PyPI
              upgrade = self._do_upgrade(dist)
              if upgrade is not None:
                  dist = upgrade
  
          return dist
docs: Handle importing a vendored package from a subdirectory of the source
          distribution.