如何使用 echo "*" 读取密码在 Python 控制台程序中? [英] How to read password with echo "*" in Python console program?

问题描述

我正在 Windows 下用 Python 编写一个控制台程序.
用户需要登录才能使用该程序，当他输入密码时，我希望他们回显为*"，而我可以得到用户输入的内容.
我在标准库中找到了一个名为 getpass 的模块，但是当您输入时它不会回显任何内容(类似 linux).
谢谢.

I'm writing a console program with Python under Windows.
The user need to login to use the program, when he input his password, I'd like they to be echoed as "*", while I can get what the user input.
I found in the standard library a module called getpass, but it will not echo anything when you input(linux like).
Thanks.

推荐答案

getpass 模块是用 Python 编写的.你可以很容易地修改它来做到这一点.事实上，这是 getpass.win_getpass() 的修改版本，您可以将其粘贴到您的代码中:

The getpass module is written in Python. You could easily modify it to do this. In fact, here is a modified version of getpass.win_getpass() that you could just paste into your code:

import sys

def win_getpass(prompt='Password: ', stream=None):
    """Prompt for password with echo off, using Windows getch()."""
    import msvcrt
    for c in prompt:
        msvcrt.putch(c)
    pw = ""
    while 1:
        c = msvcrt.getch()
        if c == '\r' or c == '\n':
            break
        if c == '\003':
            raise KeyboardInterrupt
        if c == '\b':
            pw = pw[:-1]
            msvcrt.putch('\b')
        else:
            pw = pw + c
            msvcrt.putch("*")
    msvcrt.putch('\r')
    msvcrt.putch('\n')
    return pw

不过，您可能需要重新考虑这一点.Linux 方式更好；即使只是知道密码中的字符数，对于想要破解密码的人来说也是一个重要的提示.

You might want to reconsider this, however. The Linux way is better; even just knowing the number of characters in a password is a significant hint to someone who wants to crack it.

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