Python-mode: Vim plugin for developing Python applications in the Vim editor

Python-mode is a Vim plug-in that enables you to write Python code faster in the Vim editor using various libraries including pylint, rope, pydoc, pyflakes, pep8, autotopep8, pep257 and mccable , these libraries provide some coding functions, such as static analysis, feature reconstruction, folding, completion and documentation, etc.

Recommended reading: How to use the Bash-Support plug-in to turn the Vim editor into an IDE for writing Bash scripts

This plug-in contains all the features you can use to develop Python applications in the Vim editor.

Features of Python-mode

It contains the following features worth mentioning:

• Supports Python 2.6 to Python 3.2 versions
• Syntax Highlighting
• Provide virtualenv support
• Supports Python-style folding
• Provides enhanced Python indentation
• Ability to run Python code in Vim
• Ability to add/delete breakpoints
• Support Vim actions and operators for Python objects
• Ability to inspect code while running (pylint, pyflakes, pylama...)
• Support automatic repair of PEP8 errors
• Allow searching in Python documentation
• Support code refactoring
• Support strong code completion
• Support definition jump

In this tutorial, I will explain how to set up Python-mode for Vim installation in Linux to develop Python applications in the Vim editor.

How to install Python-mode for Vim in Linux system

Install Pathogen first (it makes installing plugins super easy, and the run files are in a private directory), making it easier to install Python-mode

Run the following command to obtain the pathogen.vim file and the directory it requires:

# mkdir -p ~/.vim/autoload ~/.vim/bundle && /
# curl -LSso ~/.vim/autoload/pathogen.vim https://tpo.pe/pathogen.vim

Then add the following content to the ~/.vimrc file:

execute pathogen#infect()
syntax on
filetype plugin indent on

After installing pathogen, you can put the Python-mode plug-in into the ~/.vim/bunble directory as follows:

# cd ~/.vim/bundle
# git clone https://github.com/klen/python-mode.git

Then rebuild helptags in Vim like this:

:helptags

You need to enable filetype-plugin (:help filetype-plugin-on) and filetype-indent (:help filetype-indent-on) to use Python-mode.

Installing Python-mode in Debian and Ubuntu

Another way to install Python-mode in Debian and Ubuntu is to use a PPA, like below

$ sudo add-apt-repository https://klen.github.io/python-mode/deb main
$ sudo apt-get update
$ sudo apt-get install vim-python-mode

If you encounter the message: “The following signatures couldn’t be verified because the public key is not available”, please run the following command:

$ sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys B5DF65307000E266

Now, use vim-addon-manager to enable Python-mode:

$ sudo apt install vim-addon-manager
$ vim-addons install python-mode

Customizing Python-mode in Linux

If you want to override the default key bindings, you can redefine them in the .vimrc file, such as:

" Override go-to.definition key shortcut to Ctrl-]
let g:pymode_rope_goto_definition_bind = "<c->"
" Override run current python file key shortcut to Ctrl-Shift-e
let g:pymode_run_bind = "<c-s-e>"
" Override view python doc key shortcut to Ctrl-Shift-d
let g:pymode_doc_bind = "<c-s-d>"
</c-s-d></c-s-e></c->

Note that by default, Python-mode uses Python 2 for syntax checking. You can enable Python 3 syntax checking by adding the following line to your .vimrc file.

let g:pymode_python = 'python3'

You can find more configuration options in the Python-mode GitHub repository: https://github.com/python-mode/python-mode

That’s all. In this tutorial, I show you how to configure Vim using Python-mode in Linux. Please remember to share your thoughts with us via the feedback form below.

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About the Author:

Aaron Kili is a Linux and F.O.S.S enthusiast, Linux sysadmin, web developer, and now content creator at TecMint who loves working with computers and believes in sharing knowledge.

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