About my message:
>> ... Nickel summary, lookup order is not dirt simple, and reading
>> and writing work differently.
David MacQuigg wrote:
Maybe I'm missing some subtleties, but it still seems simple to me.
> An attribute is looked up in the order object -> class -> superclasses,
> *UNLESS* that attribute happens to be a property of the class....
The subtleties involve the difference in the lookup order between
read-only properties and properties with a write method.
...
class Rectangle(object):
def __init__(self, width, height):
self.width = width
self.height = height
# self.area = width * height
def getArea(self):
return self.width * self.height
...
Written in later versions of Python (2.5 and up) as:
class Rectangle(object):
def __init__(self, width, height):
self.width = width
self.height = height
# self.area = width * height
@property
def area(self):
return self.width * self.height
--Scott David Daniels
scott.dani...@acm.org
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