def lock(self, name, timeout=None, sleep=<NUM_LIT:0.1>):
return Lock(self, name, timeout=timeout, sleep=sleep)<EOL>
Return a new Lock object using key ``name`` that mimics
the behavior of threading.Lock.

If specified, ``timeout`` indicates a maximum life for the lock.
By default, it will remain locked until release() is called.

``sleep`` indicates the amount of time to sleep per loop iteration
when the lock is in blocking mode and another client is currently
holding the lock.