def getNewRecordsFromEventObject(event=None):
    """
    This function returns a list of (bucketName, objectKey) tuples
    extracted from the event object.
    """
    if not event or not event["Records"]:
        raise ValueError("no Records to process")
    
    s3Records = [eventRecord['s3'] for eventRecord in event['Records']]
    return [(s3Record['bucket']['name'], s3Record['object']['key']) for s3Record in s3Records]