This project is not affiliated with Microsoft in any way, shape, or form
Pyright for Python is a Python command-line wrapper over pyright, a static type checker for Python.
Use the package manager pip to install pyright.
pip install pyright
Tip
It's highly recommended to install pyright
with the nodejs
extra which uses nodejs-wheel
to
download Node.js binaries as it is more reliable than the default nodeenv
solution.
pip install pyright[nodejs]
Pyright can be invoked using two different methods
pyright --help
or
python3 -m pyright --help
Pyright for Python should work exactly the same as pyright does, see the pyright documentation for details on how to make use of pyright.
You can also setup pyright to run automatically before each commit by setting up pre-commit and registering pyright in your .pre-commit-config.yaml
file
repos:
- repo: https://github.com/RobertCraigie/pyright-python
rev: v1.1.391
hooks:
- id: pyright
Pre-commit will install pyright-python in its own virtual environment which can cause pyright to not be able to detect your installed dependencies.
To fix this you can either tell pre-commit to also install those dependencies or explicitly tell pyright which virtual environment to use by updating your pyright configuration file:
[tool.pyright]
# ...
venvPath = "."
venv = ".venv"
Pyright is written in TypeScript, requiring node to be installed, and is normally installed with npm. This could be an entry barrier for some Python developers as they may not have node or npm installed on their machine; I wanted to make pyright as easy to install as any normal Python package.
This project works by first checking if node is in the PATH
. If it is not, then we download node at runtime using nodeenv, then install the pyright npm package using npm
and finally, run the downloaded JS with node
.
By default Pyright for Python is set to target a specific pyright version and new releases will be automatically created whenever a new pyright version is released. It is highly recommended to use an automatic dependency update tool such as dependabot.
If you would rather not have to update your installation every time a new pyright release is created then you can automatically use the latest available pyright version by setting the environment variable PYRIGHT_PYTHON_FORCE_VERSION
to latest
.
You can configure Pyright for Python using environment variables.
Set PYRIGHT_PYTHON_DEBUG
to any value.
Set PYRIGHT_PYTHON_FORCE_VERSION
to the desired version, e.g. 1.1.156
, latest
Set PYRIGHT_PYTHON_PYLANCE_VERSION
to your Pylance version, e.g. 2023.11.11
, latest-release
, latest-prerelease
. The corresponding Pyright version will be used. See Pylance's changelog for details on recent releases. Note that PYRIGHT_PYTHON_FORCE_VERSION
takes precedence over PYRIGHT_PYTHON_PYLANCE_VERSION
, so you'll want to set one or the other, not both.
By default, Pyright for Python disables npm error messages, if you want to display the npm error messages then set PYRIGHT_PYTHON_VERBOSE
to any truthy value.
Pyright for Python will resolve the root cache directory by checking the following environment variables, in order:
PYRIGHT_PYTHON_CACHE_DIR
XDG_CACHE_HOME
If neither of them are set it defaults to ~/.cache
Set PYRIGHT_PYTHON_GLOBAL_NODE
to any non-truthy value, i.e. anything apart from 1, t, on, or true.
e.g. off
You can optionally choose the version of node used by setting PYRIGHT_PYTHON_NODE_VERSION
to the desired version
Set PYRIGHT_PYTHON_ENV_DIR
to a valid nodeenv directory. e.g. ~/.cache/nodeenv
Set PYRIGHT_PYTHON_IGNORE_WARNINGS
to a truthy value, e.g. 1, t, on, or true.
Pyright for Python will print warnings for the following case(s)
- There is a new Pyright version available.
All pull requests are welcome.