What is the difference between .append() and .extend() in a few words in Python?

Append is for a single value, extend for iterables.

Append: Adds its argument as a single element to the end of a list. Extend(): Iterates over its argument and adding each element to the list and extending the list

# You can see the difference in an example like this: x = [0] x.append([1, 2]) x.extend([3, 4]) print(x)