Reference
Reference pages are useful on their own — a one-sentence purpose, a minimal example, signature, edge cases, and implementation notes — and link back to the lessons that teach the concept in context.
Categories
Syntax
Statements, expressions, and language forms.
Built-ins
Built-in functions, types, and constants.
Standard library
Modules from the Python standard library.
Exceptions
Built-in exception types and what raises them.
Protocols
Dunder methods and the interfaces they implement.
Packaging
Project layout, dependencies, and distribution.
Patterns
Recurring designs and idioms.