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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 call(method, path, ret_type, ret_is_list=False, data=None, params=None, api_version=1):
 """ Generic function for calling a resource method and automatically dealing with serialization of parameters and deserialization of return values. @param method: method to call (must be bound to a resource; e.g., "resource_root.get"). @param path: the full path of the API method to call. @param ret_type: return type of the call. @param ret_is_list: whether the return type is an ApiList. @param data: Optional data to send as payload to the call. @param params: Optional query parameters for the call. @param api_version: minimum API version for the call. """

  check_api_version(method.im_self, api_version)
  if data is not None:
    data = json.dumps(Attr(is_api_list=True).to_json(data, False))
    ret = method(path, data=data, params=params)
  else:
    ret = method(path, params=params)
  if ret_type is None:
    return
  elif ret_is_list:
    return ApiList.from_json_dict(ret, method.im_self, ret_type)
  elif isinstance(ret, list):
    return [ ret_type.from_json_dict(x, method.im_self) for x in ret ]
  else:
    return ret_type.from_json_dict(ret, method.im_self)