Guido van Rossum guido at python.org
Sun Oct 18 23:10:07 EDT 2015

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Assigning __class__ is a precarious stunt (look at the implementation, it
requires lots of checks for various things like __slots__ and
implementation-specific special cases). The gesture that looks like
"overriding a method" is merely setting a new instance attribute that hides
the method, and quite tame in comparison.

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--Guido van Rossum (python.org/~guido)
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