Deprecated since version The: mutex module has been removed in
Python 3.0. The mutex module defines a class that allows mutual-
exclusion via acquiring and releasing locks. It does not require
(or imply) threading or multi-tasking, though it could be useful
for those purposes. The mutex module defines the following
class: class class mutex.mutex Create a new (unlocked) mutex. A
mutex has two pieces of state — a “locked” bit and a queue. When
the mutex is not locked, the queue is empty. Otherwise, the
queue contains zero or more (function, argument) pairs
representing functions (or methods) waiting to acquire the lock.
When the mutex is unlocked while the queue is not empty, the
first queue entry is removed and its function(argument) pair
called, implying it now has the lock. Of course, no multi-
threading is implied – hence the funny interface for lock(),
where a function is called once the lock is acquired. mutex
objects have following methods: Check whether the mutex is
locked. “Atomic” test-and-set, grab the