Type Hints for Python 3.5
summary
PEP 484 defines optional type hints and is accepted into Python 3.5 beta 1; a pure-Python typing module implements names like Any, Union and Optional and is marked provisional. Type checking runs separately from the interpreter so execution cost is unchanged. Stubs (.pyi) let C extensions and third-party packages supply annotations without changing source. The design supports gradual typing, generic types, forward references and will work with external type checkers.
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chapters (14)
- 0:00Start
- 0:09Type Hints
- 1:58Function Annotation Syntax
- 5:07Static Type Checking Is Not a Function of the Python Interpreter
- 6:28Function Annotations
- 11:33Additional Documentation
- 12:13C Extensions
- 13:54Stub Files
- 28:13What Is Gradual Typing
- 34:10Generic Types
- 34:31Union Type
- 35:08Tuple
- 36:42Generic Functions
- 37:07Type Variable
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