Remove an Item from a SetΒΆ

S.discard(val)

Remove an Item from a Set if it is present in the set.
# Create a new set
S = set([0, 1, 2, 3, 4, 5])

# Discard number 4
S.discard(4)
print(S)                               # {0, 1, 2, 3, 5}