初尝多线程：目标成果:打印a,b,c ——sleep(1)——打印a,b,c——sleep(1)——打印a,b,c……当前的结果还是有问题的

threading_demo.py

import threading
import time


# x = 0

def write(text):
    # global x
    lock.acquire()
    while 1:
        print text,
        lock.release()
        time.sleep(1)
        # x += 1
        break


def line(text):
    write('%s\n' % text)

lock = threading.Lock()

if __name__ == '__main__':
    lst = ['a', 'b', 'c']
    while 1:
        for i in lst:
            new_thread = threading.Thread(target=line, args=(i,))
            new_thread.start()
            new_thread.join()