Typing your Python code like a ninja!
summary
Covers concrete typing techniques and shows them working: uses overload with a single implementation to give precise return types (example: get_user with strict=True → User, strict=False → Optional[User]), applies generics and bounded TypeVar so double(x) preserves type but forbids Decimal, demonstrates TypeGuard narrows types so is_user(obj) lets the checker treat obj as User, uses TypedDict for kwargs to catch missing fields at type check time, and adds override decorator and typing.Self to prevent signature regressions; examples compile with mypy/pyright and sometimes need tweaks for real frameworks.
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chapters (13)
- 0:00Introduction
- 1:09Basic type examples
- 2:36Overload for flexible types
- 4:23Generics in Python
- 6:30Generic classes
- 7:14Generic callables
- 9:02Type narrowing issues
- 10:05Type guard vs type is
- 12:09TypeDict for kwargs
- 14:14Overrides in inheritance
- 16:42Typing self in builders
- 19:36Final ninja example
- 20:17Q&A session
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