Nils Kattenbeck <nilskem...@gmail.com> added the comment:

What is/was the initial reason to not preserve the MRO for a TypedDict?
The only thing which came to my mind would be instantiation performance but as 
annotations are not evaluated by default and on the right-hide side of 
assignment most people will use dict literals I am not sure if this is still 
relevant. Otherwise it might even be simpler to just preserve the original 
bases in TypedDict but please correct me if I overlooked something

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nosy: +Nils Kattenbeck

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Python tracker <rep...@bugs.python.org>
<https://bugs.python.org/issue41249>
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