code: def _get_config_file_in_folder(cls, path):
          
          if os.path.isfile(path):
              path = os.path.dirname(path)
  
          for fn in cls.PROJECT_CONFIG_FILES:
              config = RawConfigParser()
              full_path = os.path.join(path, fn)
              if config.read(full_path) and cls._get_section_name(config):
                  return full_path
docs: Look for a configuration file in `path`.
  
          If exists return its full path, otherwise None.