[Python-Dev] Is static typing still optional? (original) (raw)

Guido van Rossum guido at python.org
Sun Dec 17 11:22:53 EST 2017


On Sun, Dec 17, 2017 at 2:11 AM, Julien Salort <listes at salort.eu> wrote:

Le 15/12/2017 à 22:14, Paul Moore a écrit :

Annotations and the annotation syntax are fundamental to the design. But that's core Python syntax. But I wouldn't describe types as being that significant to the design, it's more "if you supply them we'll make use of them".

Naive question from a lurker: does it mean that it works also if one annotates with something that is not a type, e.g. a comment, @dataclass class C: a: "This represents the amplitude" = 0.0 b: "This is an offset" = 0.0

I would personally not use the notation for this, but it is legal code. However static type checkers like mypy won't be happy with this.

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