python – In a list, what is the difference between append and extend?

Question:

In a Python list , there are append and extend methods.

What is the difference between them and when should I use each one?

Answer:

extend()

Takes an " iterable " as a parameter and extends the list by adding its elements

lista = [1, 2, 3]
lista.extend([4, 5])
print(lista) 
# Saída: [1, 2, 3, 4, 5]

append()

add an element to the end of the list

lista = [1, 2, 3]
lista.append([4, 5])
print(lista) 
# Saída: [1, 2, 3, [4, 5]]