Python Lock library for ETCD 2.0

Since ETCD 0.4, all the built in modules were removed, including the locking module. The API still provides an atomic compare-and-swap method to implement locking, thus providing the core functionality to create semaphores and mutexes. This library is built on top of that, matching the API that was in python-etcd before it was removed as much as possible.

Simple Usage

import etcd
from etcdlock import Lock

lock = Lock(etcd.Client(), 'path/to/my/key')
while lock
    # lock is acquired
    # lock will renew itself by default until released
    # do work
    request = ....

    # check if we still have the lock
    if lock.is_locked() is False:
        return

Explicit Usage

import etcd
from etcdlock import Lock

client = client = etcd.Client(host='api.example.com', protocol='https', port=443, version_prefix='/etcd')
lock = Lock(client, 'path/to/my/key', ttl=30, renewSecondsPrior=)
if lock.acquire(timeout=20):
    t = Thread(target=someheavywork)
    t.run()
    t.wait()
    lock.renew()
    # some other work
    lock.release() # not recommended, use a context manager
else
    # failed to acquire the lock in 20 seconds
    pass

Please see the tests while the documentation is lacking, thanks.