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Remove items from Set - Python

Last Updated : 19 Apr, 2025

We are given a set and our task is to remove specific items from the given set. For example, if we have a = {1, 2, 3, 4, 5} and need to remove 3, the resultant set should be {1, 2, 4, 5}.

Using remove()

remove() method in Python is used to remove a specific item from a set. If the item is not present it raises a KeyError so it's important to ensure item exists before using it.

Python


 a = {1, 2, 3, 4, 5}

a.remove(3)  
print(a)

Explanation:

a.remove(3) removes element "3" from the set a and if element is not found then it raises a KeyError.
after removal of element, set a is printed and element "3" is no longer part of the set.

Using discard()

discard() method in Python removes a specified element from a set without raising a KeyError even if element does not exist in set. It's a safer alternative to remove() as it doesn't cause an error when element is missing.

Python


 a = {1, 2, 3, 4, 5}

a.discard(3)
a.discard(6)  

print(a)

Explanation:

discard(3) method removes element "3" from the set a if it exists.
discard(6) method does nothing because "6" is not present in set and no error is raised.

Using pop()

pop() method removes and returns a random element from a set. Since sets are unordered element removed is arbitrary and may not be predictable.

Python


 a = {1, 2, 3, 4, 5}
r = a.pop()
print(f"Removed: {r}")
print(a)

Output

Removed: 1
{2, 3, 4, 5}

Explanation:

pop() method removes and returns a random element from the set "a" and removed element is stored in variable "r".
After removal, set "a" is printed showing remaining elements without randomly chosen item.

Using clear()

clear() method removes all elements from a set effectively making it an empty set. It does not return any value and directly modifies original set.

Python


 a = {1, 2, 3, 4, 5}
a.clear()  
print(a)

Explanation: clear() method removes all elements from the set "a", leaving it empty.

Also read: remove(), discard(), clear(), pop(), set.

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