ZeroDivisionError when groupby rank with method="dense" and pct=True#23864

Merged

WillAyd merged 11 commits intopandas-dev:masterfrom

Koustav-Samaddar:bug-23666

Dec 3, 2018

Commits on Nov 22, 2018

BUG: Fixed groupby.rank w/ method="dense", pct=True if any grp count is 1
Koustav-Samaddar
committed

Commits on Nov 24, 2018

Fixed pep8 formatting to have empty line at end of file
Koustav-Samaddar
committed
Updated to have more test cases for better coverage
Koustav-Samaddar
committed

Commits on Dec 1, 2018