多线程-共享全局变量
from threading import Thread
import time
g_num = 100
def work1():
global g_num
for i in range(3):
g_num += 1
print("----in work1, g_num is %d---"%g_num)
def work2():
global g_num
print("----in work2, g_num is %d---"%g_num)
print("---线程创建之前g_num is %d---"%g_num)
t1 = Thread(target=work1)
t1.start()
#延时一会,保证t1线程中的事情做完
time.sleep(1)
t2 = Thread(target=work2)
t2.start()
运行结果:
---线程创建之前g_num is 100---
----in work1, g_num is 103---
----in work2, g_num is 103---