Limit on the number of running scripts?

Question

linux

Good day, I use subprocess to run the script

subprocess.Popen("path/python.py %s &" % stats.id,
                             shell=True, stdout=subprocess.PIPE)

I would like to introduce a restriction so that when it is already running, it would be impossible to launch the second one.

Answer 1

docs.python.org/2/library/fcntl.html - flock
Well, or just run under the console flock.