En Sat, 06 Feb 2010 18:42:29 -0300, John Bokma <j...@castleamber.com>
escribió:
Sir Wilhelm the Sturdy <wgaggi...@gmail.com> writes:
I recently attempted to subclass the datetime.date object resulting in
horror and confusion, before submitting to a has-a relationship.
That's all fine and dandy, but out of curiosity I'd like to know what
I'm missing.
class MyDate(datetime.date):
def __init__(self,*args,**kw):
...
__init__ is *not* the construction method, __new__ is (at least with new
style classes)
You're right. But in this case, instead of overriding __new__, I would add
a separate constructor to avoid confusion with the existing one (a
classmethod, actually, like fromordinal and fromtimestamp):
py> from datetime import date
py> class date(date):
... @classmethod
... def fromDMY(cls, d, m=None, y=None):
... today = date.today()
... if m is None: m = today.month
... if y is None: y = today.year
... return cls(y, m, d)
...
py> date.fromDMY(20, 3, 2010)
date(2010, 3, 20)
py> date.fromDMY(11)
date(2010, 2, 11)
--
Gabriel Genellina
--
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