Set Operations
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This lesson explains how to perform union, intersection, and other operations on Python sets.
Set Operations
Set operations are used to perform mathematical operations like union, intersection, difference, etc.
Union (| or union())
Union combines elements from both sets and removes duplicates.
set1 = {1, 2, 3}
set2 = {3, 4, 5}
result = set1 | set2
print(result)Intersection (& or intersection())
Intersection returns common elements present in both sets.
set1 = {1, 2, 3}
set2 = {2, 3, 4}
result = set1 & set2
print(result)Difference (- or difference())
Difference returns elements present in the first set but not in the second.
set1 = {1, 2, 3}
set2 = {2, 3, 4}
result = set1 - set2
print(result)Symmetric Difference (^ or symmetric_difference())
Returns elements that are in either set but NOT in both.
set1 = {1, 2, 3}
set2 = {3, 4, 5}
result = set1 ^ set2
print(result)Subset (<=)
Checks if all elements of one set are inside another set.
a = {1, 2}
b = {1, 2, 3, 4}
print(a <= b)Superset (>=)
Checks if a set contains all elements of another set.
a = {1, 2, 3, 4}
b = {1, 2}
print(a >= b)Disjoint Sets
Two sets are disjoint if they have no common elements.
a = {1, 2}
b = {3, 4}
print(a.isdisjoint(b))