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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def get_local_directory_dist(self):
 """ Handle importing a vendored package from a subdirectory of the source distribution. """


        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