Are Python sets mutable

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In other words, if I do this:

x = set([4, 5, 6])
y = x

y |= set([7, 8, 9])

Are x and y still pointing to the same object, or was a new set created and assigned to y?

Feb 18 in Python by surbhi
• 3,810 points
51 views

1 answer to this question.

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>>>> x = set([4, 5, 6])
  • Sets are unordered.

  • Set elements are unique.

  • It is not permitted to use duplicate elements.

  • A set's elements can be changed, but the set's elements must be of an immutable type.

set1 = {4,5,6}

set2 = {4,5,[4,5]}  --> unhashable type: 'list'
# Set elements should be immutable.

Hence, we can see that sets are mutable.

answered Feb 18 by CoolCoder
• 4,360 points

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