System-wide mutex in Python on Linux

Question

Is there any easy way to have a system-wide mutex in Python on Linux? By \"system-wide\", I mean the mutex will be used by a group of Python processes; this is in c

Answer 1

The POSIX standard specifies inter-process semaphores which can be used for this purpose. http://linux.die.net/man/7/sem_overview

The multiprocessing module in Python is built on this API and others. In particular, multiprocessing.Lock provides a cross-process "mutex". http://docs.python.org/library/multiprocessing.html#synchronization-between-processes

EDIT to respond to edited question:

In your proof of concept each process is constructing a Lock(). So you have two separate locks. That is why neither process waits. You will need to share the same lock between processes. The section I linked to in the multiprocessing documentation explains how to do that.