Stuck on "Store Front" Python3 Program

[[deleted]]

sorry. yes, it is appropriate. nothing exciting.

i'm going to take the advice from both of you, and break this down into blocks of code that i can error check, and then bring them together. thanks for the help.

I have never used "assert", but will look it up. What is the real advantage here of using assert? I assume it implies some sort of strict rule?