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

[Alexander Belopolsky]

Alexander Belopolsky <belopolsky at users.sourceforge.net> added the comment:

This is trivial to implement (see attached) and IMHO is a good idea.

The next question, however is whether similar changes should be made to 
timedelta arithmetics.  Timedelta case is not so clearcut because of the 
usual dilemma of what the type of a+b should be when a and b are 
instances of two different subclasses of timedelta.

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keywords: +patch
nosy: +belopolsky
Added file: http://bugs.python.org/file9651/datetime.diff

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