CODEWITHSUNDEEP
pythonmultithreading
applesauce
applesauce

Reputation: 3

threading: join() never returns

I am trying to create multiple threads, add them to a list, go through that list and join each one like this:

threads = []
for i in range(0, 4):
    new_thread = threading.Thread(target=Runnable())
    new_thread.start()
    threads.append(new_thread)
for thread in threads:
    print("in thread")
    print(thread)
    thread.join()
    print("after join")

It will print "In thread" and the thread, but it never prints "after join" and because of that all of my code after does not run. Runnable() is a function I created, which also prints what it should so I'm not sure if that code has anything to do with it.

Upvotes: 0

Views: 961

Answers (1)

martineau
martineau

Reputation: 123463

You're calling Runnable as you create each Thread instance, so the thread's target function is whatever it returns (possibly None). Try using:

new_thread = threading.Thread(target=Runnable)

Which has target=Runnable instead of target=Runnable().

Upvotes: 2

Related Questions