No way to get lock sequence number without exposing internals

[garbled1]

Need a function or similar to get the lock sequence number when acquiring a lock. If you want to do something like a shell script that utilizes the lock, you can't:

#!/bin/bash
SEQ=$(take_lock.py)
do_something_that_needs_locking
release_lock.py -s ${SEQ}

Currently I do this by printing lock._sequence, but that is obviously bad form. Would like lock.get_sequence() or similar please.