Servers Python

python-language-server

A Python 2.7 and 3.4+ implementation of the Language Server Protocol.

Installing server

pip install python-language-server

Once the python-language-server is installed, you can register the python-language-server in your .vimrc

Registering in .vimrc

if executable('pyls')
    au User lsp_setup call lsp#register_server({
        \ 'name': 'pyls',
        \ 'cmd': {server_info->['pyls']},
        \ 'whitelist': ['python'],
        \ })
endif

Workspace Configuration

python-language-server has several settings that can be tweaked through the workspace configuration. For example, enabling pydocstyle (which is disabled by default):

if executable('pyls')
    au User lsp_setup call lsp#register_server({
        \ 'name': 'pyls',
        \ 'cmd': {server_info->['pyls']},
        \ 'whitelist': ['python'],
        \ 'workspace_config': {'pyls': {'plugins': {'pydocstyle': {'enabled': v:true}}}}
        \ })
endif

The full set of options that can be manipulated can be found in package.json.

ty and ruff

ty is a type checker and language server for Python. ruff is a linter and code formatter for Python.

Installing server

uv tool install ty
uv tool install ruff

If you do not use uv, use the tool you prefer for installing executable Python packages.

Registering in .vimrc

if executable('ty')
    au User lsp_setup call lsp#register_server({
        \ 'name': 'ty',
        \ 'cmd': {server_info->['ty', 'server']},
        \ 'allowlist': ['python'],
        \ })
endif

if executable('ruff')
    au User lsp_setup call lsp#register_server({
        \ 'name': 'ruff',
        \ 'cmd': {server_info->['ruff', 'server']},
        \ 'allowlist': ['python'],
        \ })
endif