带有os.system()的Python'source HOME/.bashrc' [英] Python 'source HOME/.bashrc' with os.system()

问题描述

我正在编写一个Python脚本(Linux)，该脚本添加了 shell别名(将它们写了出来)到 HOME/.bash_aliases ).

I am writing a python script (Linux) that is adding some shell aliases (writes them to HOME/.bash_aliases).

为了使别名在写入后立即可用，我应该发出以下内置的bash:

In order to make an alias available immediately after it was written I should issue the following bash built-in:

source HOME/.bashrc

source 是bash内置的，所以我不能:

source is a bash built-in so I cannot just:

os.system(source HOME/.bashrc)

如果我尝试类似的操作:

If i try something like:

os.system('/bin/bash -c source HOME/.bashrc')

...将冻结脚本(就像正在等待某些内容一样).

...will freeze the script (just like is waiting for something).

有什么建议吗?

推荐答案

您想要的东西是不可能的.程序(您的脚本)无法修改调用者(您从中运行它的外壳)的环境.

What you want is not possible. A program (your script) cannot modify the environment of the caller (the shell you run it from).

另一种允许您完成一些操作的方法是使用bash函数编写该函数，该函数在同一进程中运行，并且可以修改调用方.请注意，在运行时进行采购可能会产生负面影响，具体取决于用户在其bashrc中拥有什么.

Another approach which would allow you to do something close is to write it in terms of a bash function, which is run in the same process and can modify the caller. Note that sourcing during runtime can have possible negative side-effects depending on what the user has in their bashrc.

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