I'm learning Python 3 using The Quick Python Book, where the author talks about frozensets, stating that since sets are mutable and hence unhashable, thereby becoming unfit for being dictionary keys, their frozen counterparts were introduced. I am using The Quick Python Book Study Python 3, The author talks about frozensets, Point out that because the set is variable , Therefore, it is not hashable , Therefore, it is not suitable to be used as a dictionary key , Therefore, their freezing counterparts are introduced .Other than the obvious difference that a tuple is an ordered data structure while frozenset, or more generally a set, is unordered, are there any other differences between a tuple and a frozenset? Except that tuples are ordered data structures and frozenset Or more generally, the set is disordered beyond the obvious difference , Tuples and frozenset Are there any other differences between them ?