[Python-Dev] Dictionary subclasses and exec (original) (raw)

Fred L. Drake, Jr. fdrake@acm.org
Tue, 23 Oct 2001 21:30:27 -0400

akuchlin@mems-exchange.org writes:

Oh, well; I need to come up with a different example for subclassing a built-in type, then. Thanks!

Andrew, You can take a look at that implementation of xml.dom.minidom.NodeList; for Python 2.2, the implementation goes like this:

class NodeList(list): def item(self, index): if 0 <= index < len(self): return self[index]

length = property(lambda self: len(self),
                  doc="The number of nodes in the NodeList.")

-Fred

-- Fred L. Drake, Jr. PythonLabs at Zope Corporation