def revert_temporary_config(self):
        if os.path.isdir(self.config.temp_checkpoint_dir):
            try:
                self._recover_checkpoint(self.config.temp_checkpoint_dir)
            except errors.ReverterError:
                # We have a partial or incomplete recovery
                logger.fatal("Incomplete or failed recovery for %s",
                             self.config.temp_checkpoint_dir)
                raise errors.ReverterError("Unable to revert temporary config")
Error 407 -- proxy authentication required.
dataset/ETHPy150Open letsencrypt/letsencrypt/certbot/reverter.py/Reverter.revert_temporary_config--crossover with--dataset/ETHPy150Open kleientertainment/ds_mod_tools/pkg/win32/Python27/Lib/urllib.py/FancyURLopener.http_error_407