Task cancellation pattern for asyncio applications.

Read more in the documentation on ReadTheDocs. View the change log.

pip install asyncio-cancel-token

If you would like to hack on asyncio-cancel-token, please check out the Ethereum Development Tactical Manual for information on how we do:

• Testing
• Pull Requests
• Code Style
• Documentation

You can set up your dev environment with:

git clone [email protected]:ethereum/asyncio-cancel-token.git
cd asyncio-cancel-token
virtualenv -p python3 venv
. venv/bin/activate
pip install -e .[dev]

During development, you might like to have tests run on every file save.

Show flake8 errors on file change:

# Test flake8
when-changed -v -s -r -1 cancel_token/ tests/ -c "clear; flake8 cancel_token tests && echo 'flake8 success' || echo 'error'"

Run multi-process tests in one command, but without color:

# in the project root:
pytest --numprocesses=4 --looponfail --maxfail=1
# the same thing, succinctly:
pytest -n 4 -f --maxfail=1

Run in one thread, with color and desktop notifications:

cd venv
ptw --onfail "notify-send -t 5000 'Test failure ⚠⚠⚠⚠⚠' 'python 3 test on asyncio-cancel-token failed'" ../tests ../cancel_token

For Debian-like systems:

apt install pandoc

To release a new version:

make release bump=$$VERSION_PART_TO_BUMP$$

The version format for this repo is {major}.{minor}.{patch} for stable, and {major}.{minor}.{patch}-{stage}.{devnum} for unstable (stage can be alpha or beta).

To issue the next version in line, specify which part to bump, like make release bump=minor or make release bump=devnum.

If you are in a beta version, make release bump=stage will switch to a stable.

To issue an unstable version when the current version is stable, specify the new version explicitly, like make release bump="--new-version 4.0.0-alpha.1 devnum"