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Re:What’s New in Python 3.8 by bouncing on Tuesday October 15, 2019 @05:44AM (#21256925)
I can definitely imagine some places where this replaces type-checking, but it still seems like a bit of an unfortunate anti-pattern to me, since it's really a sort of C/C++ style function prototype match.

My immediate thought is that it's going to be hard for PyCharm to reliably point me to a function definition.

Re:What’s New in Python 3.8 by heavenlyblue on Tuesday October 15, 2019 @06:50AM (#21257246)
>> My immediate thought is that it's going to be hard for PyCharm to reliably point me to a function definition.

I am certain PyCharm is going to special-case these decorators in their next release.