Map is a common way to transform lists in most programming languages. In Python, map is a function that loops over a list and applies a function (that you provide) to each item. Your function receives ...

For example, list_of_ints.append (4) would turn list_of_ints into the list [1,2,3,4]. Appends are fast and efficient; it takes about the same amount of time to append one item to a list no matter ...