进程内存空间彼此隔离

# from multiprocessing import Process
# import time
#
# x=100
# def task():
#     global x
#     x=0
#     print('done')
# if __name__ == '__main__':
#     p=Process(target=task)
#     p.start()
#     time.sleep(500) # 让父进程在原地等待，等了500s后，才执行下一行代码
#     print(x)
from multiprocessing import Process
import time
def foo():
    print(123)
    time.sleep(1)
    print("end123")

def bar():
    print(456)
    time.sleep(3)
    print("end456")

if __name__ == '__main__':
    p1=Process(target=foo)
    p2=Process(target=bar)

    p1.daemon=True
    p1.start()
    p2.start()
    print("main________")