Lecture 12 — From scripts to an installable package

Tue 3 Nov 2026 · Boris Bolliet

TL;DR — An installed package is found through sys.path from any folder. pyproject.toml declares what to install. The wheel holds only what the declarations name.

Slides Notes Self-test

Demonstration files

File	View	Download	Colab
lecture12-mine.ipynb
lecture12.ipynb

No new data in this lecture.

Content

1. The import system
   • The import search path
   • Packages and relative imports
   • The src layout
2. Project metadata and installation
   • Distributions and the project file
   • Version specifiers and optional dependencies
   • Editable installs and lock files
3. Console commands and the public interface
   • Console commands
   • The public interface
   • Semantic versions
4. Wheels
   • The contents of a wheel
   • Package data
   • Compatibility tags

Exercises with solutions