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Guido van Rossum - Type Hints for Python 3.5
[EuroPython 2015]
[22 July 2015]
[Bilbao, Euskadi, Spain]

PEP 484, "Type Hints", was accepted in time for inclusion in Python
3.5 beta 1. This introduces an optional standard for specifying types
in function signatures. This concept was previously discussed as
"optional static typing" and I similar to the way TypeScript adds
optional type declarations to JavaScript.

In this talk I will discuss the motivation for this work and show the
key elements of the DSL for describing types (which, by the way is
backward compatible with Python 3.2, 3.3 and 3.4). Note: *Python will
remain a dynamically
typed language, and I have no desire to ever make type hints
mandatory, even by convention!*