Difference between append vs extend list methods in Python

Question

What's the difference between the list methods append() and extend()?

Answer 1

append: Appends object at 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 by appending elements from the iterable.

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

gives you: [1, 2, 3, 4, 5]

Hope it helps!!

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Answer 2

Python append() method adds an element to a list, and the extend() method concatenates the first list with another list (or another iterable). When append() method adds its argument as a single element to the end of a list, the length of the list itself will increase by one. Whereas extend() method iterates over its argument adding each element to the list, extending the list. The length of the list will increase by however many elements were in the iterable argument.

Comments

Thanks, @germyrlnn! Good explanation. I have upvoted your answer.

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So extends unpacks whereas append shuffles one object into another in its original form?

Answer 3

There is a simple difference between append and insert in python list, append method can be use for adding new element in the list only but by using insert we can add as well as can modify already occupied position

Comments

thanks, its helpful.

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Thank you this helps a lot

Answer 4

append(self,object,/)

Append object to the end of the list.. but whereas

extend(self,iterable,/)

Extend list by appending elements from the iterable