Python Built-in Methods – Python Set remove() Method

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Python Set remove() Method

Removes a specified item from the set

Usage

The remove() method removes a specified item from the set.

If specified item is not present in the set, the method raises KeyError.

Syntax

set.remove(item)

Parameter Condition Description
item Required An item you want to remove from the set

Examples

# Remove 'red' from the set
S = {'red', 'green', 'blue'}
S.remove('red')
print(S)
# Prints {'blue', 'green'}

remove() method raises KeyError, if specified item doesn’t exist in a set.

S = {'red', 'green', 'blue'}
S.remove('yellow')
print(S)
# Triggers KeyError: 'yellow'

remove() vs discard()

Both methods work exactly the same. The only difference is that the discard() method doesn’t raise any error if specified item doesn’t exist in a set.

S = {'red', 'green', 'blue'}
S.discard('yellow')
print(S)
# Prints {'blue', 'green', 'red'}

 

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