Python:通过读取标准输出关闭 for 循环 [英] Python: Closing a for loop by reading stdout

问题描述

import os

dictionaryfile = "/root/john.txt"
pgpencryptedfile = "helloworld.txt.gpg"

array = open(dictionaryfile).readlines()


for x in array:
    x = x.rstrip('\n')
    newstring = "echo " + x + " | gpg --passphrase-fd 0 " + pgpencryptedfile
    os.popen(newstring)

我需要在 for 循环中创建一些东西来读取 gpg 的输出.当 gpg 输出这个字符串 gpg: WARNING: message was notintegrity protected 时，我需要关闭循环并打印 Success！

I need to create something inside the for loop that will read gpg's output. When gpg outputs this string gpg: WARNING: message was not integrity protected, I need the loop to close and print Success!

我该怎么做，背后的原因是什么?

How can I do this, and what is the reasoning behind it?

谢谢大家！

推荐答案

使用 subprocess.check_output 调用 gpg 并根据其输出中断循环.

Use subprocess.check_output to call gpg and break the loop based on its output.

这样的东西(未经测试，因为我对 gpg 一无所知):

Something like this (untested since I don't know anything about gpg):

import subprocess

dictionaryfile = "/root/john.txt"
pgpencryptedfile = "helloworld.txt.gpg"

with open(dictionaryfile, 'r') as f:
    for line in f:
        x = line.rstrip('\n')
        cmd = ["echo " + x + " | gpg --passphrase-fd 0 " + pgpencryptedfile]
        output = subprocess.check_output(cmd, shell=True)
        if 'gpg: WARNING: message was not integrity protected' in output:
            break

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