On 15/02/12 18:14, Sivaram Neelakantan wrote:
I was under the impression that you have to define the attributes of
the class before using it in an instance.
Only in some languages. Python is not one of those.
class Point:
... """pts in 2d space"""
...
b = Point()
b.x =3
b.y =4
print b.y
4
Why is it not throwing an error? This is confusing me a bit.
Python allows instance attributes to be added at runtime.
In general this is a bad idea IMHO, a dictionary would probably
be more appropriate, but there can, very occasionally, be valid
uses for it.
--
Alan G
Author of the Learn to Program web site
http://www.alan-g.me.uk/
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