pandas groupby sort descending order

Question

pandas groupby will by default sort. But I\'d like to change the sort order. How can I do this?

I\'m guessing that I can\'t apply a sort method to the returned gro

Answer 1

Similar to one of the answers above, but try adding .sort_values() to your .groupby() will allow you to change the sort order. If you need to sort on a single column, it would look like this:

df.groupby('group')['id'].count().sort_values(ascending=False)

ascending=False will sort from high to low, the default is to sort from low to high.

*Careful with some of these aggregations. For example .size() and .count() return different values since .size() counts NaNs.

What is the difference between size and count in pandas?