Designing a graph study program

[Marc 'BlackJack' Rintsch]

In <1178659258.820806.110380 at l77g2000hsb.googlegroups.com>, andrea wrote:

> Interesting but what do you mean for two graph-implementatio that
> share the same interface??
> I don't have abstract classes or interfaces in python, am I wrong?

You are thinking of some kind of types or enforcements.  If two classes
have some methods with the same names and the same semantics they share
the same interface.  And a class that isn't meant to be instantiated or
doesn't implement all methods is an abstract class.

Ciao,
	Marc 'BlackJack' Rintsch