Whereas on Python/typing < 3.5.2 type parameters are stored to __parameters__ attribute, on Python/typing ≥ 3.5.2 __parameters__ attribute is gone and __args__ attribute comes instead.
This patch makes the code compatible with both old and new typing versions.
Whereas on Python/
typing< 3.5.2 type parameters are stored to__parameters__attribute, on Python/typing≥ 3.5.2__parameters__attribute is gone and__args__attribute comes instead.This patch makes the code compatible with both old and new
typingversions.