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There is one issue with the way the
MaskScoreWrapper
uses generics in python 3.9.This PR fixes it.
I could not figure out how to place the type annotations in such a way that it is not tripping the runtime checks in Python 3.9 and pytype at the same time. So I decided to remove them alltogether and inherit from
gym.ObservationWrapper
just likeObsCastWrapper
.