CODEWITHSUNDEEP
pythonmultiprocessingblocking
nathancahill
nathancahill

Reputation: 10850

Blocking subprocess function in Python?

I had an asynchronous function being called like this:

from multiprocessing import Process

def my_function(arg1, arg2):
    print 'Long process begins'

p = Process(target=my_function, args=(arg1, arg2,)).start()

How can I make this blocking? I need to finish the process before running the rest of the script.

Upvotes: 1

Views: 195

Answers (1)

Jakob Bowyer
Jakob Bowyer

Reputation: 34698

Use p.join()

Block the calling thread until the process whose join() method is called terminates or until the optional timeout occurs.

If timeout is None then there is no timeout.

A process can be joined many times.

A process cannot join itself because this would cause a deadlock. It is an error to attempt to join a process before it has been started.

Upvotes: 2

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