python - Winpty 和 Git Bash

Question

我遇到了与 Python not working in the command line of git bash 相同的问题，在 Git Bash 中，当我键入 Python 时，它只是挂起。

但是，输入 winpty python 效果很好。

winpty 到底是什么？为什么上面的命令有用？

Answer 1

winpty是一个 Windows 软件包，提供类似于 Unix pty-master 的接口(interface)，用于与 Windows 控制台程序进行通信。

这就是为什么您需要它作为 described here :

The software works by starting the winpty-agent.exe process with a new, hidden console window, which bridges between the console API and terminal input/output escape codes. It polls the hidden console's screen buffer for changes and generates a corresponding stream of output.

rprichard/winpty提及:

The package consists of a library (libwinpty) and a tool for Cygwin and MSYS for running Windows console programs in a Cygwin/MSYS pty.

详见“mintty/mintty Tips”:

When interacting with programs that use a native Windows API for command-line user interaction (“console mode”), a number of undesirable effects are observed; this is the pty incompatibility problem and the character encoding incompatibility problem.
This basically affects all programs not compiled in a cygwin or msys environment (and note that MinGW is not msys in this context).

As a workaround, you can use winpty as a wrapper to invoke the Windows program.

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所以:

Why do many tools work in plain CygWin but some of them also need winpty?

这是在 msys2/MINGW-packages issue 2645 中提出的(专门针对 Python)

there's a non-zero cost associated with using winpty, and most of the time, mintty works fine anyway.
Your problem stems from trying to use mingw python which is a native windows build, and hence expects it to be used from a windows console.
mintty uses pipes for input/output, so it doesn't look like a proper terminal to most programs.

On the other hand, if you use msys2 (or cygwin) python (.e.g /usr/local/bin/python2), everything just works.

(使用 msys2/MINGW-packages PR 2675 ，python3 正确检测到终端)