多线程共享全局变量（加锁）

import threading

# 加锁
metux = threading.Lock()
age = 0


class Metux(object):
    def f1(self):
        global age
        for i in range(10):
            metux.acquire()
            age = age + i
            metux.release()
            print(age)

    def f2(self):
        for i in range(11):
            global age
            metux.acquire()
            age = age + i
            metux.release()
            print(age)


if __name__ == '__main__':
    m = Metux()
    t1 = threading.Thread(target=m.f1())
    t2 = threading.Thread(target=m.f2())

    t1.start()
    t2.start()