如何在python模块中挂钩函数? [英] How can I hook a function in a python module?

问题描述

因此，我在虚拟环境中的程序包安装在它的site-packages文件夹中. 在该程序包中，有一个带有一堆功能的模块，我想更改其中一个功能而不接触程序包代码，所以我想对该模块做一个钩子，然后更改/覆盖该功能，使其表现为我想要.

So I have a package in my virtual environment installed in the site-packages folder of it. In that package there is a module with a bunch of functions, I want to change one of these functions without touching the package code, so I want to make a hook of that module and then change/overwrite the function so it behaves in the way I want.

我不知道这在python中是否可行(我是该语言的新手)

I don't know if this is even posible in python (I'm new to the language)

示例:

我的site-packages文件夹中有一个名为them_package的软件包，内部有一个名为what.py的模块，其代码如下:

I have a package called their_package in my site-packages folder, inside I have a module named whatever.py with the following code:

import sys
import os

def this_is_a_function(parameter):
    //whatever logic in here
    return result

我想要的是钩住what.py模块，以便我可以重新定义this_is_a_function以具有不同的逻辑.这可以吗?我将不胜感激一个代码示例！

What I want is to hook the whatever.py module so I can redefine the this_is_a_function to have a diferent logic. Is this posible? I would appreciate a lot a code sample!

提前谢谢！:)

推荐答案

您可以使用以下方法重新定义函数:

You can redefine your function with:

import whatever

def this_is_a_function(parameter):
    pass

whatever.this_is_a_function = this_is_a_function

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