问题
I am a beginner in python and multiprocessing so if the question seems naive please forgive me. I have two functions that I want to run at the same time. One is an openCV implementation of face recognition and the other is a standard python code.
def main():
does(s) # a function call
def face():
recog.main() #another call
As you can guess, both the functions are the final end user functions that one has to call to implement the task. I want them both to run simutaneously.
Previous answers on this topic advise threading module but I have tried it and it does not work. The first func. to be called is executed first and then the second one. A friend of mine recommended rospy module. Is it the only way? Thanks in anticipation.
EDIT: In the answer to this, Make 2 functions run at the same time , a user has written that threading actually won't make two functions run at the same time
回答1:
I use the multiprocessing module for running two functions parallel. For what I did (changed to your situation):
import multiprocessing
def main():
does(s) # a function call
def face():
recog.main() #another call
# Initiate two workers for the two functions
workerMAIN = multiprocessing.Process(target=main)
workerFACE = multiprocessing.Process(target=face)
# Start the workers
workerMAIN.start()
workerFACE.start()
# Wait until the functions have finished
workerMAIN.join()
workerFACE.join()
来源：https://stackoverflow.com/questions/37829466/parallel-processing-on-python