try to annotate the fromstring factory method correctly, while mypy 0.4.2 seems to not correctly support pep484 classmethod(cls: Type[T]) -> T syntax
try to annotate the fromstring factory method correctly, while mypy 0.4.2 seems to not correctly support pep484 classmethod(cls: Type[T]) -> T syntax

gopythongo/gopythongo,gopythongo/gopythongo