基本使用

1. 导入进程包

import multiprocessing

2. 创建子进程并制定执行的任务

# 进程对象 = multiprocessing.Process(target = 任务名)
test_process =  multiprocessing.Process(target = test)

3. 启动进程执行任务

# 进程对象.start()
test_process.start()

基础示例

import multiprocessing
import time

def coding():
  for i in range(3):
    print('coding...')
    time.sleep(0.1)

def music():
  for i in range(3):
    print('music...')
    time.sleep(0.1)

if __name__ == '__main__':
  coding_process = multiprocessing.Process(target=coding)
  music_process = multiprocessing.Process(target=music)

  coding_process.start()
  music_process.start()

注意： 进程间不共享全局数据。

带有参数的任务

1. args：元组方式传参一定要和参数的顺序保持一致。
2. kwargs：字典方式传参字典中的key一定要和参数名保持一致。

import multiprocessing
import time

def coding(num, name):
  for i in range(num):
    print(name)
    print('coding...')
    time.sleep(0.1)

def music(count):
  for i in range(count):
    print('music...')
    time.sleep(0.1)

if __name__ == '__main__':
  coding_process = multiprocessing.Process(target=coding, arges=(3,"Tom"))
  music_process = multiprocessing.Process(target=music, kwargs={"count":2})

  coding_process.start()
  music_process.start()