How to iterate over a column that has different categorical groups?
Let's say column called Lot has 3 different entries. And that I wanted to add a logic to create a column called "Box Start" that checks which box runs on sequence 1 and copies that information for all entries of that lot in a column called "Box Start" like how it is done below. How can I design a for loop to perform this operation?LotSequenceBoxBox StartA1aStarts on aA2bStarts on aA3a Starts on aA...