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Python List | pop method

Operations
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List Operations
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Documentation
schedule Jul 1, 2022
Last updated
local_offer Python
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Python's list.pop(~) method removes the element at the given index from a list and then returns the removed value.

NOTE

The list.pop(~) method is useful when you want to remove an element from a list and then perform some action with the removed element such as adding it to another list.

Parameters

1. index | number | optional

The index position of the element to be removed. Default is -1, the last element in the list.

Return value

The removed value.

Examples

Basic usage

To remove the last element of fav_animals and return it:

fav_animals = ['cat', 'doge', 'bird']
fav_animals.pop()
'bird'

To pop the first element of fav_animals and add it to a separate list norm_animals:

fav_animals = ['cat', 'doge', 'bird']
norm_animals = []
norm_animals.append(fav_animals.pop(0))
print("fav_animals =", fav_animals)
print("norm_animals =", norm_animals)
fav_animals = ['doge', 'bird']
norm_animals = ['cat']

Here 'cat' is popped from fav_animals and then used as input for the list.append(~) method to add it to the list norm_animals.

IndexError

If the specified index to pop does not exist, an IndexError is raised:

fav_animals = ['cat', 'doge', 'bird']
fav_animals.pop(3)
IndexError: pop index out of range
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Published by Isshin Inada
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