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from multiprocessing import Process
import os, time, random
def pr():
for i in range(10):
print('r'+str(i))
time.sleep(random.random() * 3)
def pw():
for i in range(10):
print('w' + str(i))
time.sleep(random.random() * 3)
if __name__=='__main__':
p1 = Process(target=pr)
p2 = Process(target=pw)
p1.start()
p2.start()
p1.join()
p2.join()