Why does pd.groupby need the __eq__ method to be implemented? Shouldn’t __hash__ be enough? /u/pstmps Python Education

Sorry if this is the wrong place to post this. I implemented a custom data type for pandas and want to use groupby. I need both eq and hash to be implemented, which isn’t a problem, but I can’t wrap my head around why. ( I can’t implement lt le_ etc. but that’s ok, I use sort=False). I took a look at the source code but I can’t understand it yet. Any help is appreciated.

Sorry if this is the wrong place to post this. I implemented a custom data type for pandas and want to use groupby. I need both eq and hash to be implemented, which isn’t a problem, but I can’t wrap my head around why. ( I can’t implement lt le_ etc. but that’s ok, I use sort=False). I took a look at the source code but I can’t understand it yet. Any help is appreciated.