python - append vs. extend -

what's difference between list methods append() , extend()?

append: appends object @ end.

x = [1, 2, 3] x.append([4, 5]) print (x) 

gives you: [1, 2, 3, [4, 5]]

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extend: extends list appending elements iterable.

x = [1, 2, 3] x.extend([4, 5]) print (x) 

gives you: [1, 2, 3, 4, 5]