Registry / devops / python-language-server

python-language-server

library0.36.2pypypi✓ verified 86d ago

An implementation of the Language Server Protocol (LSP) for Python. Version 0.36.2 is the final release; the project is deprecated in favor of python-lsp-server (a community fork) and pyright/pylance. It provides IDE features like autocompletion, linting, code navigation, and refactoring.

devops

pip install python-language-server

github ↗package ↗

INSTALL

IMPORT

SIG · PYTHON-LANGUAGE-SE

python-language-server

devopspythonv0.36.2

Install

2.5s avg

Import

45ms

Disk

29MB

Pass rate

10/ 10

Env Coverage10 / 10

glibc

3.9–3.13

musl

3.9–3.13

Install & Compatibility

Where this runs

tested against v0.36.2 · pip install

no network on importno background threads

Install × environment matrix

Each cell = how many times install + import succeeded across repeated harness runs. Partial = flaky.
glibc = Debian/Ubuntu slim · musl = Alpine Linux

musl

py 3.10–3.95 runs

installs and imports cleanly · install 0.0s · import 0.048s · 33.1MB

glibc

py 3.10–3.95 runs

installs and imports cleanly · install 2.5s · import 0.042s · 30MB

29MB installed

● package 29MB

Code

Verified usage

Verified import paths — ran on the pinned version, not inferred.

pyls

✓ import pyls

✗ from pyls import server

The main entry point is the `pyls` module; direct imports of internal submodules are unsupported.

Basic usage: the server is typically started by an editor plugin. The `pyls` module provides a `ProcessServer` class for programmatic launching.

# Start the language server (usually launched by an editor plugin) # For manual testing, run: # pyls # In code, you can invoke the server programmatically: import pyls server = pyls.ProcessServer() print("Python Language Server started. Use an LSP client to connect.")

pyls --version

Debug

Known issues

deprecatedpython-language-server is deprecated. The Palantir project has been archived and no longer maintained. Users should migrate to python-lsp-server (community fork) or pyright/pylance.

fix

Replace python-language-server with python-lsp-server: `pip install python-lsp-server` and change imports to `import pylsp`.

affects: >=0.36.0

breakingIn version 0.36.0, the configuration format changed. Options that were previously under 'pyls' section are now under the tool's name (e.g., 'pyls.plugins' moved to 'pyls.plugins.jedi' etc.).

fix

Update your .pylsrc or editor settings to match the new schema. See: https://github.com/palantir/python-language-server/releases/tag/0.36.0

affects: 0.36.x

gotchaThe package name on PyPI is python-language-server, but the import module is 'pyls'. Many users mistakenly try `import python_language_server` or `import pyls` with wrong casing.

fix

Use `import pyls` (all lowercase).

affects: all

Errors

Common errors & fixes

ModuleNotFoundError: No module named 'pyls'

The package is installed but not in the current Python environment, or the wrong import name is used.

fix

Ensure the package is installed: `pip install python-language-server`. Then import as `import pyls`.

AttributeError: module 'pyls' has no attribute 'ProcessServer'

Using an older version of pyls that lacks the ProcessServer class (introduced in 0.36.0).

fix

Upgrade to the latest version: `pip install --upgrade python-language-server`.

Error: No configuration found for 'pyls'

Configuration file is missing or uses an outdated format.

fix

Create a `.pylsrc` file in the project root or home directory. See https://github.com/palantir/python-language-server#configuration

Upgrade

Version history

0.36.2latest on PyPI · released Dec 11, 2020

Audit

Dependencies

jedirequiredRequired for autocompletion and code analysis (jedi 0.17+ compatible).

pylintoptionalOptional linting provider.

flake8optionalOptional linting provider.

pycodestyleoptionalOptional linting provider.

mccabeoptionalOptional linting provider.

Agent activity

14 hits · last 30 days

node

OpenAI (training)

Resources

githubhttps://github.com/palantir/python-language-server ↗

packagehttps://pypi.org/project/python-language-server/ ↗