BUG: use hash-function which takes nans correctly into account for ExtensionDtype#42135

Merged

jreback merged 4 commits intopandas-dev:masterfrom

realead:right_hash_and_equal

Jun 22, 2021

Commits on Jun 18, 2021

fix signess (should be unsigned) of the return type for hash, was wrong defined in #39592
realead
committed

Commits on Jun 19, 2021

make hash and equal functions accessible from pure python
realead
committed
do not use hash-function because for python>=3.10 it no longer has the desired behavior for nans
realead
committed

Commits on Jun 21, 2021

adding function declarations to hashtable.pyi
realead
committed