Contributing to Tianshou

Install Develop Version

To install Tianshou in an “editable” mode, run

$ pip install -e ".[dev]"

in the main directory. This installation is removable by

$ python develop --uninstall

PEP8 Code Style Check and Code Formatter

We follow PEP8 python code style with flake8. To check, in the main directory, run:

$ make lint

We use isort and yapf to format all codes. To format, in the main directory, run:

$ make format

To check if formatted correctly, in the main directory, run:

$ make check-codestyle

Type Check

We use mypy to check the type annotations. To check, in the main directory, run:

$ make mypy

Test Locally

This command will run automatic tests in the main directory

$ make pytest

Test by GitHub Actions

  1. Click the Actions button in your own repo:

  1. Click the green button:

  1. You will see Actions Enabled. on the top of html page.

  2. When you push a new commit to your own repo (e.g. git push), it will automatically run the test in this page:



Documentations are written under the docs/ directory as ReStructuredText (.rst) files. index.rst is the main page. A Tutorial on ReStructuredText can be found here.

API References are automatically generated by Sphinx according to the outlines under docs/api/ and should be modified when any code changes.

To compile documentation into webpage, run

$ make doc

The generated webpage is in docs/_build and can be viewed with browser (

Chinese documentation is in

Documentation Generation Test

We have the following three documentation tests:

  1. pydocstyle: test all docstring under tianshou/;

  2. doc8: test ReStructuredText format;

  3. sphinx test: test if there is any error/warning when generating front-end html documentation.

To check, in the main directory, run:

$ make check-docstyle