Developing Flit =============== To get a development installation of Flit itself:: git clone https://github.com/pypa/flit.git cd flit python3 -m pip install docutils requests python3 bootstrap_dev.py This links Flit into the current Python environment, so you can make changes and try them without having to reinstall each time. Testing ------- To run the tests in separate environments for each available Python version:: tox `tox `_ has many options. To run the tests in your current environment, run:: pytest