How do I add a list of values to a list in Python?
You can use the insert() method to insert an item to a list at a specified index. Each item in a list has an index. The first item has an index of zero (0), the second has an index of one (1), and so on. In the example above, we created a list with three items: ['one', 'two', 'three'] .
Can you += to a list?
For a list, += is more like the extend method than like the append method. With a list to the left of the += operator, another list is needed to the right of the operator. All the items in the list to the right of the operator get added to the end of the list that is referenced to the left of the operator.