On Fri, Jun 20, 2008 at 6:19 PM, Hamish McKenzie
<[EMAIL PROTECTED]> wrote:
>
> I have this class:
>
> class Vector(object):
> TOL = 1e-5
> def __eq__( self, other, tolerance=TOL ):
> print tolerance
>
>
> shortened for clarity obviously. so I want to subclass this class like
> so:
>
> class BigVector(Vector)
> TOL = 100
>
>
> for example if I was working with large vectors which I knew would never
> be very close hence the large tolerance. this doesn't work however -
> the TOL class variable, while overridden in BigVector, is still using
> the Vector.TOL variable in the __eq__ method.
>
>
> which kinda makes sense to a certain degree, but how do I get the
> behaviour where doing:
>
> BigVector().__eq__( otherVec )
No, don't do this. Just do "avector == othervector"
>
>
> prints 100 instead of 1e-5?
>
> does this question make sense? not sure how clearly I'm phrasing my
> question... any of you guys python experts?
>
>
> I *could* do this, but its ugly:
>
> class Vector(object):
> TOL = 1e-5
> def __eq__( self, other, tolerance=None ):
> if tolerance is None: tolerance = self.TOL
> print tolerance
>
class Vector(object):
TOL = 1e-5
def __eq__(self, other):
print self.TOL
>
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> http://mail.python.org/mailman/listinfo/python-list
>
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-- Guilherme H. Polo Goncalves
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