> > Looking at PEP 484, I came up with two use cases that I felt were not > > catered for: > > > > 1. Specifying that a parameter should be a subclass of another > > (example: Type[dict] would match dict or OrderedDict; plain "Type" would > > equal "type" from builtins) > > > > > I don't understand. What is "Type"? Can you work this out in a full > example? This code is already okay: > > def foo(a: dict): > ... > > foo(OrderedDict())
I think Alex means this: https://github.com/ambv/typehinting/issues/107 This could be really useful, for example: def fancy_instantiate(cls: Type[T]) -> T: ...
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