63 - 在线程中如何创建和使用全局对象

'''
threading.local()
local类用于创建一个全局对象，不过改该对象只能在线程内部使用，也就是说吗，全局是针对一个线程而言的
'''
import threading
import time

a = threading.local()

def worker():
    a.x = 0
    for i in range(20):
        time.sleep(0.01)
        a.x += 1
    print(threading.current_thread(), a.x)


if __name__ == '__main__':
    for i in range(10):
        threading.Thread(target=worker).start()

<Thread(Thread-6, started 24600)> 20

<Thread(Thread-12, started 12432)> 20

<Thread(Thread-10, started 23456)> 20

<Thread(Thread-11, started 16156)> 20

<Thread(Thread-9, started 22104)><Thread(Thread-13, started 11292)> 20<Thread(Thread-7, started 3968)> 20

<Thread(Thread-14, started 15756)> 20

<Thread(Thread-8, started 11416)> 20

<Thread(Thread-15, started 10864)> 20

 20