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example4.py
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39 lines (28 loc) · 801 Bytes
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# ch3/example4.py
import threading
import time
class MyThread(threading.Thread):
def __init__(self, name, delay):
threading.Thread.__init__(self)
self.name = name
self.delay = delay
def run(self):
print('Starting thread %s.' % self.name)
thread_lock.acquire()
thread_count_down(self.name, self.delay)
thread_lock.release()
print('Finished thread %s.' % self.name)
def thread_count_down(name, delay):
counter = 5
while counter:
time.sleep(delay)
print('Thread %s counting down: %i...' % (name, counter))
counter -= 1
thread_lock = threading.Lock()
thread1 = MyThread('A', 0.5)
thread2 = MyThread('B', 0.5)
thread1.start()
thread2.start()
thread1.join()
thread2.join()
print('Finished.')