Fix comments on safe_isinstance() #602
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isinstance() is even less safe than I thought. Proof: ``` >>> class X: ... @Property ... def __class__(self): 1/0 ... >>> isinstance(X(), int) Traceback (most recent call last): File "<stdin>", line 1, in <module> File "<stdin>", line 3, in __class__ ZeroDivisionError: division by zero ```
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isinstance() is even less safe than I thought.
Proof: