Python - join two lists

In this article, we would like to show you how to join two lists in Python.

In this example, we use + operator to join two lists.

Practical example:

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list1 = ['A', 'B']

list2 = ['C', 'D']

​

result = list1 + list2

​

print(result)  # ['A', 'B', 'C', 'D']

Output:

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['A', 'B', 'C', 'D']

In this example, we use extend() method to add list2 at the end of list1.

Practical example:

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list1 = ['A', 'B']

list2 = ['C', 'D']

​

list1.extend(list2)

​

print(list1)  # ['A', 'B', 'C', 'D']

Output:

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['A', 'B', 'C', 'D']

In this example, we use append() method to append items from list2 at the end of list1 one by one.

Practical example:

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list1 = ['A', 'B']

list2 = ['C', 'D']

​

for x in list2:

    list1.append(x)

​

print(list1)  # ['A', 'B', 'C', 'D']

Output:

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['A', 'B', 'C', 'D']