code: def _time_to_datetime(value):
    
    if not isinstance(value, datetime.time):
      raise TypeError('Cannot convert to datetime expected time value; '
                      'received %s' % value)
    return datetime.datetime(1970, 1, 1,
                             value.hour, value.minute, value.second,
                             value.microsecond)
docs: Convert a time to a datetime for Cloud Datastore storage.
  
    Args:
      value: A datetime.time object.
  
    Returns:
      A datetime object with date set to 1970-01-01.