Creating a new list that has two already defined variables

You can create a new list by combining two already defined variables using the + operator or the extend() method.

Here's an example:

list1 = [1, 2, 3]
list2 = [4, 5, 6]

new_list = list1 + list2
print(new_list)  # Output: [1, 2, 3, 4, 5, 6]

Alternatively, you can use the extend() method:

list1 = [1, 2, 3]
list2 = [4, 5, 6]

list1.extend(list2)
print(list1)  # Output: [1, 2, 3, 4, 5, 6]

Note that the extend() method modifies the original list (list1), whereas the + operator creates a new list.

You can also use the concat() method from the itertools module:

import itertools

list1 = [1, 2, 3]
list2 = [4, 5, 6]

new_list = list(itertools.concat(list1, list2))
print(new_list)  # Output: [1, 2, 3, 4, 5, 6]

However, the concat() method is not a built-in method and requires importing the itertools module. The + operator and extend() method are more commonly used and convenient ways to combine lists.