python 进程间通信IPC

进程间通信IPC

• 文件

  通过读写文件来进行变量，数据，信息的传递
  1）读写冲突
  两个进程同时进行写，或者一个写一个读，造成了冲突。
  2）解决读写冲突
  互斥锁

import requests
import time
from threading import Thread
from multiprocessing import Process, Lock


def save_ro_file(index, lock):
    with lock:
        with open(r"D:/pythonfile/test.log", "a", encoding="utf-8") as f:
            f.write(str(index) + "n")


if __name__ == '__main__':
    process_array = []
    lock = Lock()
    for i in range(10):
        p = Process(target=save_ro_file, args=(i, lock))
        process_array.append(p)
        p.start()
    for p in process_array:
        p.join()
    print("done !")

打印结果：