Sets are unordered collections of unique, hashable elements.
1Operations
a | b union, a & b intersection, a − b difference, a ^ b symmetric difference
a <= b subset test
add, remove (error if missing), discard (no error)
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Sets are unordered collections of unique, hashable elements.
a | b union, a & b intersection, a − b difference, a ^ b symmetric difference
a <= b subset test
add, remove (error if missing), discard (no error)