[Python-Dev] Mixed-type datetime comparisons

[Tim Peters]

I checked in changes so that datetime and date comparison return
NotImplemented (instead of raising TypeError) if "the other" argument has a
timetuple attribute.  This gives other kinds of datetime objects a chance to
intercept the comparison and implement it themselves.

Note that this doesn't help for mixed-type time or timedelta comparison:
datetime's time and timedelta objects don't have timetuple methods
themselves, and their comparison implementations still raise TypeError
whenever they don't recognize the other comparand's type (this is needed to
prevent comparison against objects of arbitrary types from falling back to
the default comparison of object addresses).