Python in a Nutshell

The thread Module

The only part of the thread module that your code should use directly is the lock objects that module thread supplies. Locks are simple thread-synchronization primitives. Technically, thread’s locks are non-reentrant and unowned: they do not keep track of what thread last locked them, so there is no specific owner thread for a lock. A lock is in one of two states, locked or unlocked.

To get a new lock object (in the unlocked state), call the function named allocate_lock without arguments. This function is supplied by both modules thread and threading. A lock object L supplies three methods.