You can use anything immutable like a string, a number, a tuple of immutables, a...

		LtWorf 6 days ago \| parent \| context \| favorite \| on: Python JIT project was asked to pause development You can use anything immutable like a string, a number, a tuple of immutables, a frozendict, any dataclass with frozen=True, and so on. No need to do the annoying if x is None.
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