[issue2267] datetime.datetime operator methods are not subclass-friendly

[Brett Cannon]

Brett Cannon <brett at python.org> added the comment:

There is a difference between methods and overridden operators (slightly) in terms of cognitive understanding. I mean creating a new instance from a timestamp seems like an operation on the object by the object. Addition, though, seems like a creation of a new object by the two objects working together, which suggests contravariance.

Best I can think of. Otherwise ask on python-dev since Guido called the operator overriding expectation.

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nosy: +brett.cannon

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<http://bugs.python.org/issue2267>
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