1#append to list
2lst = [1, 2, 3]
3li = 4
4lst.append(li)
5#lst is now [1, 2, 3, 4]
6
7.append("the add"): append the object to the end of the list.
8.insert("the add"): inserts the object before the given index.
9.extend("the add"): extends the list by appending elements from the iterable.