RT-Format

Format current line immediately in INSERT mode as soon as you press ENTER:

Features

Format the current line in real-time when you press ENTER.
Seamless, no need to stop your work to run an extra command like gq or :Neoformat.
When you are focusing on editing, everything is done without paying extra attention.
No external process (eg. LSP servers) dependencies.
Supported languages including Python, Lua, Ruby, and Javascript.

Requirements

Vim with "+python3" feature.
Python module "autopep8".

Quick Start

Install the plugin with vim-plug:

" Tell vim-plug to install python module with post-update hook
Plug 'skywind3000/vim-rt-format', { 'do': 'pip3 install autopep8' }

" By default, it will be triggered by `ENTER` in insert mode.
" set this to 1 to use `CTRL+ENTER` instead, and keep the  
" default `ENTER` behavior unchanged.
let g:rtf_ctrl_enter = 0

" Enable formatting when leaving insert mode
let g:rtf_on_insert_leave = 1

Enable plugin for current buffer:

:RTFormatEnable

Then you go.

Credit

Some of my other plugins may also interest you:

asynctasks.vim: Modern task system for project building, testing and deploying.
vim-quickui: The missing UI extensions for Vim 8.2 (and NeoVim 0.4).
vim-auto-popup: Display the completion menu automantically.