重定向子进程标准输出 [英] Redirecting subprocess stdout

问题描述

我使用 test.py 中的 Redir 类(如下)设置了标准输出重定向.

I've set up a stdout redirect using the class Redir in test.py (below).

输出应该在文本框中显示两个打印语句.但目前只有Output1"发送到文本框，Output2"打印在后面的控制台中.

The output should show both print statements in the textbox. But currently only "Output1" is sent to the textbox and "Output2" printed in the console behind.

我想知道是否有办法重定向子进程的标准输出?我试过使用 subprocess.PIPE 和 Redir 类本身，但无法正确使用.

I wondered if there was a way to redirect the stdout of a subprocess? I've tried using subprocess.PIPE and the Redir class itself but can't get it right.

注意:最终，Popen 调用将不会调用 python 文件，因此我无法仅从 Test2 获取字符串.不幸的是，我也仅限于 Python 2.6.

Note: Eventually, the Popen call won't be calling a python file, so I'm not able to just get the string from Test2. I'm also unfortunately restricted to Python 2.6.

谢谢！

test.py:

import sys
from Tkinter import *
import subprocess

class Redir(object):
    def __init__(self, textbox):
        self.textbox = textbox
        self.fileno = sys.stdout.fileno

    def write(self, message):
        self.textbox.insert(END, str(message))

class RedirectGUI(object):
    def __init__(self):
        # Create window - Ignore this bit.
        # ================================
        self.root = Tk()
        self.btn = Button(self.root, text="Print!", command=self.print_stuff, state=NORMAL)
        self.btn.pack()
        self.textbox = Text(self.root)
        self.textbox.pack()

        # Setup redirect
        # ==============
        self.re = Redir(self.textbox)
        sys.stdout = self.re

        # Main window display
        # ===================
        self.root.mainloop()

    def print_stuff(self):
        subprocess.Popen(["python", "test2.py"], stdout=self.re)
        print "Output1"

if __name__ == "__main__":
    RedirectGUI()

test2.py:

class Test2(object):
    def __init__(self):
        print "Output2"

if __name__ == "__main__":
    Test2()

推荐答案

你可以试试这个，看看你是否得到了Output2"

You could try this so see if you get the "Output2"

task = subprocess.Popen(["python", "test2.py"], stdout=subprocess.PIPE)
print task.communicate()

如果这样做，请将其发送到文本框:)

If you do, send it to the textbox :)

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