[Python-Dev] subclassing builtin data structures

[Greg Ewing]

Isaac Schwabacher wrote:
> IIUC, the argument is that the Liskov Substitution Principle is a statement
> about how objects of a subtype behave relative to objects of a supertype, and
> it doesn't apply to constructors because they aren't behaviors of existing
> objects.

Another way to say that is that constructors are class
methods, not instance methods.

-- 
Greg