What does the (relevant bit of the) setup script do? I see " dataclasses ; python_version<‘3.7’" on line 87, within the definition of dep_group. What does it do?
I have also found Jeremy’s remark to this question that python3.6 can be used with fastai v1 as long as dataclasses is installed (via pip). How can that be? Is dataclasses simply a new package that comes shipped with 3.7 but not with 3.6, and can simply be installed separately?