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applyTo **/*.py

Python Standards

These rules apply automatically whenever Copilot works on a Python file in this project. They never load for other file types, so a conversation about a Dockerfile or some JSON stays clutter-free.

Style

  • Follow PEP 8 style conventions.
  • Add type hints to every function signature.
  • Prefer f-strings over % formatting or str.format().

Error Handling

  • Catch specific exceptions; never use a bare except:.
  • Validate inputs at function boundaries and fail with a clear message.

Testing

  • Put pytest tests in samples/book-app-project/tests/ using test_*.py naming.
  • Cover the happy path and edge cases (empty input, missing data).