add missing slots to containers and their base classes (#1144)#1147

Merged

sobolevn merged 2 commits intodry-python:masterfrom ariebovenberg:1144-slots

Nov 28, 2021

+240-25

Commits on Nov 27, 2021

add missing __slots__ to containers and their base classes (#1144 )
ariebovenberg
committed

Commits on Nov 28, 2021

Fix flake8 issue
ariebovenberg
committed