Why no list heritable type?

Mike Meyer mwm at mired.org
Fri Dec 17 20:24:43 CET 2004

Jeff Shannon <jeff at ccvcorp.com> writes:

> Sion Arrowsmith wrote:
> Additionally, as I understand it UserList and UserDict are implemented
> entirely in Python, which means that there can be significant
> performance differences as well.

Actually, UserList and UserDict are just wrappers around the builtin
types. So the performance hit is one Python function call - pretty
much neglible. But new code should still subclass the builtins.

Mike Meyer <mwm at mired.org>			http://www.mired.org/home/mwm/
Independent WWW/Perforce/FreeBSD/Unix consultant, email for more information.

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