python-进程
2021-04-25 11:26
标签：multi 指令 xxxx 结束 data 概念 span target main 进程的概念： python中进程的操作 process模块是一个创建进程的模块，借助这个模块，就可以完成进程的创建。 1）进程的使用 2）进程参数的传递 3）进程间全局变量不能共享 4）进程的守护 python-进程 标签：multi 指令 xxxx 结束 data 概念 span target main 原文地址：https://www.cnblogs.com/wakey/p/13258870.html
import multiprocessing
import time
def work1():
for i in range(10):
print("正在运行work1.....", i, "子进程编号：", multiprocessing.current_process().pid)
time.sleep(0.5)
if __name__ == ‘__main__‘:
process_obj = multiprocessing.Process(target=work1, name="p1")
print("主进程编号：", multiprocessing.current_process().pid)
process_obj.start()
import multiprocessing
import time
def work1(a, b, c):
print("参数：", a, b, c)
for i in range(10):
print("正在运行work1....")
time.sleep(0.5)
if __name__ == ‘__main__‘:
# 1.args传递元祖
# process_obj = multiprocessing.Process(target=work1, args=(1, 2, 3))
# 2.kwargs传递字典
# process_obj = multiprocessing.Process(target=work1, kwargs={"a": 1, "b": 2, "c": 3})
# 3.args与kwargs混合传递
process_obj = multiprocessing.Process(target=work1, args=(1,), kwargs={"c": 3, "b": 2})
process_obj.start()
import multiprocessing
import time
g_num = 0
def work1():
global g_num
for i in range(10):
g_num += 1
print("work1.....", g_num) # 10
def work2():
print("work2.....", g_num) # 0
if __name__ == ‘__main__‘:
p1 = multiprocessing.Process(target=work1)
p2 = multiprocessing.Process(target=work2)
p1.start()
p2.start()
time.sleep(2)
print("主进程....", g_num) # 0
import multiprocessing
import time
def work():
for i in range(10):
print("子进程运行中....", i)
time.sleep(0.5)
if __name__ == ‘__main__‘:
p = multiprocessing.Process(target=work)
# 进程守护：子进程与主进程的一种约束，当主进程结束时，子进程也随之结束。
p.daemon = True
p.start()
time.sleep(2)
exit()
print("xxxxxx")