all Python 3Sets (set)function

set.isdisjoint

checking

True if the two sets have no elements in common (empty intersection).

Syntax

s.isdisjoint(other)

Cheaper than not (a & b): no intermediate set is built and the scan stops at the first shared element it finds. The argument may be any iterable, not just a set — the & operator refuses anything but a set. An empty set shares nothing with anything, so it is always disjoint.

Examples

print({1, 2}.isdisjoint({3, 4}))   # → True
print({1, 2}.isdisjoint({2, 3}))   # → False
print({1, 2}.isdisjoint([3, 4, 5]))   # → True
print({1, 2}.isdisjoint(set()))   # → True
print({'spam', 'ads'}.isdisjoint('hello world spam'.split()))   # → False
print(not ({1, 2} & {2, 3}))   # → False

See also

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