Test & Code

81: TDD with flit

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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

    Links:

    • submark · PyPI
    • submark on GitHub
    • The pyproject.toml config file — Flit 1.3 documentation
    • Flit install — Flit 1.3 documentation
    • Test & Code 80: From Python script to Maintainable Package
    ...more
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    Test & CodeBy Brian Okken
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