Python进程，多进程，获取进程id，给子进程传递参数操作示例

import threading  # 线程
import time
import multiprocessing  # 进程
def test1():
  while True:
    print("1--------")
    time.sleep(1)
def test2():
  while True:
    print("2--------")
    time.sleep(1)
def main():
  # t1 = threading.Thread(target=test1) # 线程
  # t2 = threading.Thread(target=test2)
  # t1.start()  # 多线程的方式实现多任务
  # t2.start()
  p1 = multiprocessing.Process(target=test1) # 进程 (进程比线程占用资源多)
  p2 = multiprocessing.Process(target=test2)
  p1.start()  # 多进程的方式实现多任务 (进程比线程占用资源多)
  p2.start()
if __name__ == "__main__":
  main()

import multiprocessing
import os
import time
def test():
  while True:
    print("----in 子进程 pid=%d ,父进程的pid=%d---" % (os.getpid(), os.getppid()))
    time.sleep(1)
def main():
  # os.getpid() 获取当前进程的进程id
  # os.getppid() 获取当前进程的父进程id
  print("----in 主进程 pid=%d---父进程pid=%d----" % (os.getpid(), os.getppid()))
  p = multiprocessing.Process(target=test)
  p.start() # 开启子进程
if __name__ == "__main__":
  main()

import multiprocessing
def test(a, b, c, *args, **kwargs):
  print(a) # 11
  print(b) # 22
  print(c) # 33
  print(args)  # (44, 55, 66, 77, 88)
  print(kwargs) # {'age': 20, 'name': '张三'}
def main():
  p = multiprocessing.Process(target=test, args=(11, 22, 33, 44, 55, 66, 77, 88), kwargs={"name": "张三","age": 20})
  p.start()
if __name__ == "__main__":
  main()