[Python-Dev] Keep default comparisons - or add a second set? (original) (raw)

Robert Brewer fumanchu at amor.org
Wed Dec 28 23:01:09 CET 2005

Noam Raphael wrote:

I don't think that every type that supports equality comparison should support order comparison. I think that if there's no meaningful comparison (whether equality or order), an exception should be raised.

Just to keep myself sane...

def date_range(start=None, end=None):
    if start == None:
        start = datetime.date.today()
    if end == None:
        end = datetime.date.today()
    return end - start

Are you saying the "if" statements will raise TypeError if start or end are dates? That would be a sad day for Python. Perhaps you're saying that there is a "meaningful comparison" between None and anything else, but please clarify if so.

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