STY: x.__class__ to type(x) #batch-1
- [x] ref https://github.com/pandas-dev/pandas/pull/29816
- [x] tests added / passed
- [x] passes `black pandas`
- [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff`
- [ ] whatsnew entry

thanks @MomIsBestFriend 