code: def from_rfc3339(value):
      
      return datetime.datetime.strptime(value, _RFC3339_MICROS).replace(tzinfo=pytz.utc)
docs: Convert a microsecond-precision timestamp to datetime.
  
      Args:
          value (str): The RFC3339 string to convert.
  
      Returns:
          datetime.datetime: The datetime object equivalent to the timestamp in
              UTC.