How would you add one list to another if they are identical?

Using the + operator or the .extend() method.

The + operator creates a new list.

# Creating two identical lists
list1 = [1, 2, 3]
list2 = [1, 2, 3]

# Concatenating lists with `+`
combined_list = list1 + list2

The .extend() method modifies the existing list in place.

# Creating two identical lists
list1 = [1, 2, 3]
list2 = [1, 2, 3]

# Extending list1 with list2
list1.extend(list2)

The choice depends on whether you need a new list or want to modify an existing one. For large lists, .extend() can be more efficient as it does not create a copy of the first list.