> My question is -- how can the interpreter know if it can alter what is > supposed to be an immutable in-place? If it's used only internally to a > function, the it would be safe, but how to know that?
> -CHB You can just check the reference count of your object, it's a member of the PyObject structure which every CPython object contains: ob_refcnt. This will indicate if your object is referenced by other Python variables or by Python containers such as lists, tuples, dicts, sets etc. _______________________________________________ Python-Dev mailing list Python-Dev@python.org https://mail.python.org/mailman/listinfo/python-dev Unsubscribe: https://mail.python.org/mailman/options/python-dev/archive%40mail-archive.com
