How can you concatenate two lists in Python?

Concatenating two lists in Python can be achieved effectively using the + operator. When you use the + operator between two lists, it combines them into a new list that contains all the elements from both lists in the order they were present in the original lists.

For instance, if you have two lists, list1 = [1, 2, 3] and list2 = [4, 5, 6], using list1 + list2 would yield a new list [1, 2, 3, 4, 5, 6]. This method is straightforward and intuitive for achieving list concatenation.

Other methods mentioned for handling lists have specific purposes. The append() method is used to add a single element to the end of a list, making it unsuitable for concatenating two lists directly. The extend() method can be utilized to add each element of one list to another list, but it modifies the first list in place rather than creating a new concatenated list. The join() function is actually used for concatenating strings rather than lists, which also makes it ineffective for this scenario.

The use of the + operator thus provides a clear and efficient way to concatenate two lists in Python.