Greg Ewing wrote: > In other words, just because A inherits from B in > Python isn't meant to imply that an A is a drop-in > replacement for a B.
Hmm - this is interesting. I'm not arguing Liskov violations or anything ... However, *because* Python uses duck typing, I tend to feel that subclasses in Python *should* be drop-in replacements. If it's not a drop-in replacement, then it should probably not subclass, but just use duck typing (probably by wrapping). Subclassing implies a stronger relationship to me. Which is why I think I prefer using a wrapper for a default dict, rather than a subclass. Tim Delaney _______________________________________________ Python-Dev mailing list Python-Dev@python.org http://mail.python.org/mailman/listinfo/python-dev Unsubscribe: http://mail.python.org/mailman/options/python-dev/archive%40mail-archive.com
