def ConvertAtomTimestampToEpoch(timestamp):
 return time.mktime(time.strptime(timestamp, '%Y-%m-%dT%H:%M:%S.000Z'))

def ConvertAtomTimestampToEpoch ( timestamp ) : return time . mktime ( time . strptime ( timestamp , '%Y-%m-%dT%H:%M:%S.000Z' ) )
helper function to convert a timestamp string .