Question

Pandas find number of times values repeat for each unique value

Answer 1

I feel like this is a rudimentary question but I'm very new to this and just haven't been able to crack it / find the answer.

Ultimately what I'm trying to do here is to count unique values on a certain column and then determine which of those unique values have more than one unique value in a matching column.

So for this data, what I am trying to determine is "who" has "more than one receipt" for all purchases, then determine the same information based on each product category.

I hope it will help you