collections.Set._hash¶

Set._hash()[source]¶

Compute the hash value of a set.

Note that we don’t define __hash__: not all sets are hashable. But if you define a hashable set type, its __hash__ should call this function.

This must be compatible __eq__.

All sets ought to compare equal if they contain the same elements, regardless of how they are implemented, and regardless of the order of the elements; so there’s not much freedom for __eq__ or __hash__. We match the algorithm used by the built-in frozenset type.