def GetModifiedTimedelta(api_query, from_time=None):
  """Returns how long since the API Query was updated.

  Args:
    api_query: The API Query from which to retrieve the modified timedelta.
    from_time: A DateTime object representing the start time to calculate the
               timedelta from.

  Returns:
    A string that describes how long since the API Query has been updated in
    the form of "HH hours, MM minutes, ss seconds ago" or None if the API Query
    has never been updated.
  """
  if not from_time:
    from_time = datetime.utcnow()

  api_query_response = api_query.api_query_responses.get()
  if api_query_response:
    time_delta = api_query_response.modified - from_time
    return FormatTimedelta(time_delta)
  return None
dataset/ETHPy150Open googleanalytics/google-analytics-super-proxy/src/controllers/util/models_helper.py/GetModifiedTimedelta/swapped operands of `-`