使用spyder(Anaconda)写一段代码,但Ipython console没有打印print的内容,如何解决

Sandwiches

[Asm] 纯文本查看 复制代码

# -*- coding: utf-8 -*-

"""

Created on Tue Oct  5 23:15:22 2021



@author: Administrator

"""

from multiprocessing import Process, Queue

import os

import time

import random



def write(q):

    print(f'Process to write: {os.getpid()}')

    for value in ['A', 'B', 'C']:

        print(f'Put {value} to queue...')

        q.put(value)

        time.sleep(random.random())





def read(q):

    print(f'Process to read: {os.getpid()}')

    while True:

        value = q.get(True)

        print(f'Get {value} from queue.')





def main():

    # test queue

    q = Queue()

    pw = Process(target=write, args=(q,))

    pr = Process(target=read, args=(q,))

    # 启动子进程pw，写入:

    pw.start()

    # 启动子进程pr，读取:

    pr.start()

    # 等待pw结束:

    pw.join()

    # pr进程里是死循环，无法等待其结束，只能强行终止:

    pr.terminate()





if __name__ == '__main__':

    main()

WEASYD

这个我记得好像是ipython和jupyter只会监听主进程的输出消息，他不会输出子进程中的内容，你可以讲代码放在pycharm中执行

Jack2002

代码是没问题的，pr.terminate() 强制终止，不推荐这么做，加个判断就能控制其自然退出。

[Python] 纯文本查看 复制代码

# -*- coding: utf-8 -*-

from multiprocessing import Process, Queue
import os
import time


def write(q):
        print(f'Process to write: {os.getpid()}')
        for value in ['A', 'B', 'C']:
                print(f'Put {value} to queue...')
                q.put(value)
                time.sleep(0.3)


def read(q):
        print(f'Process to read: {os.getpid()}')
        while True:
                value = q.get(True)
                if 'quit' == value:
                        break
                print(f'Get {value} from queue.')


def main():
        # test queue
        q = Queue()
        pw = Process(target=write, args=(q,))
        pr = Process(target=read, args=(q,))

        # 启动子进程pw，写入:
        pw.start()

        # 启动子进程pr，读取:
        pr.start()

        # 等待pw结束:
        pw.join()
        # 退出
        q.put('quit')

        # pr进程里是死循环，无法等待其结束，只能强行终止:
        # pr.terminate()
        pr.join()
        


if __name__ == '__main__':
        main()