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# ch12/example7.py

import threading

import time

from timeit import default_timer as timer

def thread_a():

print('Thread A is starting...')

print('Thread A is performing some calculation...')

time.sleep(2)

print('Thread A is performing some calculation...')

time.sleep(2)

def thread_b():

print('Thread B is starting...')

print('Thread B is performing some calculation...')

time.sleep(5)

print('Thread B is performing some calculation...')

time.sleep(5)

thread1 = threading.Thread(target=thread_a)

thread2 = threading.Thread(target=thread_b)

start = timer()

thread1.start()

thread2.start()

thread1.join()

thread2.join()

print('Took %.2f seconds.' % (timer() - start))

print('Finished.')