Needed to use recursion, which I never use. I hardly ever even write functions - this is fraud data. you're analyzing data to find useful rules and the impacts of potential rules. The python I use is namely like pandas, and numpy, some scikit learn stuff, but I am by no means a pro and python. I told them I'd be wasting their time trying to write this function. could have just googled it quicker but whatever. Both of these guys were like people on the other team. They don't want you, they don't want to talk to you, they're too cool for anyone, they're not friendly, they're not anyone I'd ever want to work with.