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In the last episode, we talked about going from script to supported package. I worked on a project called subark and did the packaging with flit. Today's episode is a continuation where we add new features to a supported package and how to develop and test a flit based package. Covered: viewing stages of a project with git tags flit support for editable installs flit description entry in pyproject.toml to put README on pypi. development dependencies in pyproject.toml editor layout for optimal TDD-ing test case grouping modifications to traditional TDD that helps me develop faster. code and command snippets from episode: For git checkout of versions: $ git clone https://github.com/okken/submark.git $ cd submark $ python3 -m venv venv --prompt submark $ source ./bin/activate (submark) $ git checkout v0.1 ... etc ... (submark) $ git checkout v0.7 To grab the latest again: (submark) $ git checkout master pyproject.toml change for README to show up on pypi: [tool.flit.metadata] ... description-file = "README.md" ... Adding dev dependencies to pyproject.toml: [tool.flit.metadata.requires-extra] test = ["pytest", "pytest-cov", "tox"] Installing in editable mode (in top level repo directory). works in mac, linux, windows: (submark) $ flit install --pth-file or for mac/linux: (submark) $ flit install -s