docs: def load_from_name(module_name):
      """
      从python module文件中获取配置
      :param module_name:
      :return:
      """
      global _CONFIG_CACHE
      if module_name not in _CONFIG_CACHE:
          settings = OrderedDict()
          if isinstance(module_name, six.string_types):
              settings = _load_from_module(_import_module(module_name))
          _CONFIG_CACHE[module_name] = settings
      return _CONFIG_CACHE[module_name]