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Changes between Initial Version and Version 1 of Ticket #34435, comment 6

initial	v1
2	2	> Can you suggest what changes should be done?
3	3
4		That's a good question, because python offers no simple check a la `ismutable(x)`. It would be easy to just do a check like `isinstance(x, (bool, int, float, tuple, str, frozenset))`, if you can live with the "danger" of users sub-classing those types and making them mutable. But I guess those can't be helped with this check.
	4	That's a good question, because python offers no simple check a la `ismutable(x)`. It would be easy to just do a check like `isinstance(x, (bool, int, float, tuple, str, frozenset, decimal, complex, bytes))`, if you can live with the "danger" of users sub-classing those types and making them mutable. But I guess those can't be helped with this check.