What comes to your mind when you hear the word `zip`? A mechanism extensively used to tie two parts of something, e.g. shirt or jacket. Python's `zip()` functions does pretty much the same, it helps ...

For a, b in zip (first_name, last_name), Python will interpret that line. Now, because the 'list' = (zip (first_name, last_name)) is creating tuples, for things that look like a, b, Python is going to ...