Plugin for sorting Python imports in Vim and Neovim via isort. Inspired by fisadev/vim-isort, but with a few differentiating features:

• Written in VimScript instead of Python: this is faster, less sensitive to virtual environment issues, and runs on vim builds without the +python feature.
• Adds automatic detection for first-party package names, by searching parent directories for setup.py or pyproject.toml files.
• Attempts to be minimally obtrusive: runs asynchronously where possible, with support for both Vim 8 and Neovim’s job APIs.

• Installation
• Usage
• Configuration
• Alternatives

• Install isort via pip:

  pip install isort

• Install isort.vim in your .vimrc via your favorite plugin manager, for example, vim-plug:

  Plug 'brentyi/isort.vim'

:Isort will sort all imports of a file in normal mode, or a range of lines in visual mode.

Mappings are left to the user. One possibility:

augroup IsortMappings
    autocmd!
    autocmd FileType python nnoremap <buffer> <Leader>si :Isort<CR>
    autocmd FileType python vnoremap <buffer> <Leader>si :Isort<CR>
augroup END

More advanced usage is possible with the isort#Isort(startline, endline, [callback, [enable_async]]) function. For example, one option is to use vim-codefmt to format after sorting:

:call isort#Isort(1, line('$'), function('codefmt#FormatBuffer'))

Disabling async sorting is helpful for sorting automatically before saving:

autocmd BufWritePre *.py call isort#Isort(0, line('$'), v:null, v:false)

Additional CLI arguments for isort can be configured via g:isort_vim_options:

let g:isort_vim_options = '-l 120 --wl 100 -m 2 --case-sensitive'

Here’s an example for following formatting standards enforced by black, ported from the isort documentation:

let g:isort_vim_options = join([
	\ '--multi-line 3',
	\ '--trailing-comma',
	\ '--force-grid-wrap 0',
	\ '--use-parentheses',
	\ '--ensure-newline-before-comments',
	\ '--line-length 88',
	\ ], ' ')

Or, assuming isort>=5.0.0, simply:

let g:isort_vim_options = '--profile black'

• fisadev/vim-isort is the original isort plugin for Vim, and the primary inspiration for ours.

• google/vim-codefmt has basic support for isort as a code formatter.

• If you don’t need bells and whistles or mind a cursor jump each time you sort imports, a rudimentary :Isort command can be trivially implemented:

  command! -range=% Isort :<line1>,<line2>! isort -