lightly-ai/lightly

Mypy and numpy incompatible through `make install-dev`

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#2 015 ouverte le 4 août 2026

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Description

I had the issue that make install-dev installed a numpy 2.x.x version, which was incompatible with our pinned mypy version in pyproject.toml. We should move to a lockfile approach like in LightlyTrain and clean up the dependency handling overall while we're at it.

  • unpin the mypy version, and instead use >= operator
  • create make lock command in the Makefile with a pinned EXCLUDE_NEWER_DATE inside the Makefile, so that the lock does not constantly change
  • use uv run --frozen in all the make commands instead of python
  • move dev optional dependencies to a uv group instead (dependency-groups), so that the dev group is not actually distributed via PyPI
  • update the CONTRIBUTING.md file to reflect the workflow changes (no need to activate the virtual env anymore)
  • update any agent files (CLAUDE.md etc.) to instruct the agent to always use uv run --frozen instead of python

If anyone would like to work on this (or parts of it; we can also split this into sub-issues), let me know!

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