Lists - Explanation & Formulas

1Methods

1. append(x) adds one item; extend(iterable) adds each item; insert(i, x)

2. pop() removes and returns the last item; remove(x) deletes the first match

3. sort() sorts in place and returns None; sorted(list) returns a new list

4. a[:] or list(a) makes a shallow copy; b = a only copies the reference