Handle various client side errors when describing snapshots

def extract_bad_snapshot(e):
        """Handle various client side errors when describing snapshots"""
        msg = e.response['Error']['Message']
        error = e.response['Error']['Code']
        e_snap_id = None
        if error == 'InvalidSnapshot.NotFound':
            e_snap_id = msg[msg.find("'") + 1:msg.rfind("'")]
            log.warning("Snapshot not found %s" % e_snap_id)
        elif error == 'InvalidSnapshotID.Malformed':
            e_snap_id = msg[msg.find('"') + 1:msg.rfind('"')]
            log.warning("Snapshot id malformed %s" % e_snap_id)
        return e_snap_id