Python Set pop()

The pop() method randomly removes an item from a set and returns the removed item.

Example

A = {'a', 'b', 'c', 'd'}
removed_item = A.pop()
print(removed_item)

# Output: c

pop() Syntax

The syntax of the pop() method is:

set.pop()

Here, pop() removes an item from the set and updates it.


pop() Parameters

The pop() method doesn't take any parameters.


pop() Return Value

The pop() method returns:

  • a removed item from the set
  • TypeError exception if the set is empty

Example 1: Python Set pop()

A = {'10', 'Ten', '100', 'Hundred'}

# removes random item of set A print('Pop() removes:', A.pop()) # updates A to new set without the popped item print('Updated set A:', A)

Output

Pop() removes: 10
Updated set A: {'Ten', '100', 'Hundred'}

In the above example, we have used pop() to remove the item of set A. Here, pop() removes 10 from set A and returns it.

Also, set A is updated to the new set without the removed item 10.

Note: We may get a different output every time we run it, because pop() returns and removes a random element.


Example 2: pop() with an Empty Set

# empty set
A ={}

# throws an error print(A.pop())

Output

TypeError: pop expected at least 1 argument, got 0

In the above example, we have used pop() with an empty set A. The method can not remove any item from an empty set so it throws an error.

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