What is the difference between Python's list methods append and extend?
append, data-structures, extend, list, python
Solution
`.append()` appends a specified object at the end of the list:
>>> x = [1, 2, 3]
>>> x.append([4, 5])
>>> print(x)
[1, 2, 3, [4, 5]]
`.extend()` extends the list by appending elements from the specified iterable:
>>> x = [1, 2, 3]
>>> x.extend([4, 5])
>>> print(x)
[1, 2, 3, 4, 5]
Problem
What's the difference between the list methods `append()` and `extend()`?