Hashing arrays in Python
Just try it:
>>> hash((1,2,3))2528502973977326415>>> hash([1,2,3])Traceback (most recent call last): File "<stdin>", line 1, in <module>TypeError: unhashable type: 'list'>>> hash(frozenset((1,2,3)))-7699079583225461316>>> hash(set((1,2,3)))Traceback (most recent call last): File "<stdin>", line 1, in <module>TypeError: unhashable type: 'set'So you can get hash of tuple and frozenset since the are immutable, and you can't do it for list and set because they are mutable.