Emacs defadvice on python mode function смотреть онлайн

Emacs is a powerful text editor that can be customized and extended in various ways. One of the ways to modify the behavior of functions in Emacs is by using defadvice. In this tutorial, we will explore how to use defadvice to modify the behavior of functions in the python-mode major mode. Specifically, we'll create a custom advice for the python-mode function python-indent-line, which controls the indentation of Python code.
Before you begin, you'll need to have the following set up:
Emacs Installed: You should have Emacs installed on your system.
python-mode Installed: Ensure that you have the python-mode package installed in your Emacs. You can typically install it using the package manager (e.g., M-x package-install RET python-mode).
defadvice is a mechanism in Emacs for advising functions. It allows you to add custom code before, after, or around the execution of a specified function, effectively modifying its behavior without changing the original source code.
The basic structure of defadvice is as follows:
In this tutorial, we'll create a simple defadvice for the python-indent-line function in python-mode. We'll advise this function to always indent lines by a fixed number of spaces, regardless of the context.
Here's an example of how to do this:
Now, let's break down the code: