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# SuperFastPython.com

# example of wait/notify with a condition for threads

from time import sleep

from threading import Thread

from threading import Condition

# custom function to be executed in a new thread

def task(shared_condition):

# block for a moment

sleep(1)

# notify a waiting thread that the work is done

print('Thread sending notification...')

with shared_condition:

shared_condition.notify()

# protect the entry point

if __name__ == '__main__':

# create a condition

condition = Condition()

# acquire the condition

print('Main thread waiting for data...')

with condition:

# create a new thread to execute the task

thread = Thread(target=task, args=(condition,))

# start the new new thread

thread.start()

# wait to be notified by the new thread

condition.wait()

# we know the data is ready

print('Main thread all done')