Hi All,
The context for this is trying to get ParsedXML 1.5 running on Zope 2.12
under Python 2.5 (don't ask why!)
Anyway, ParsedXML has a class:
class ManageableNodeList(ManageableWrapper, DOMProxy.NodeListProxy,
Acquisition.Implicit):
"A wrapper around a DOM NodeList."
meta_type = "Manageable NodeList"
# redefine to get back the [] syntax with acquisition, eh?
def __getslice__(self, i, j):
return self.wrapNodeList(self._node.__getslice__(i,j))
# redefine to get back the [] syntax with acquisition, eh?
def __getitem__(self, i):
return self.wrapDOMObj(self._node.__getitem__(i))
If you try and iterate over an instance of this class, you get an
AttributeError: __iter__. This doesn't make a lot of sense, since you
*don't* get an error like that if you iterate over an instance of:
class X:
def __getitem__(self,i):
return 1
I'm wondering there's some ExtensionClass or similar weirdness happening
here?
(It didn't used to happen under Zope 2.9/Python 2.4)
cheers,
Chris
PS: I have a f'ing horrible workaround for how:
...
def __iter__(self):
return SillyIterator(self)
class SillyIterator:
def __init__(self,mnl):
self.mnl = mnl
self.i = 0
def next(self):
try:
e = self.mnl[self.i]
except IndexError:
raise StopIteration
self.i+=1
return e
--
Simplistix - Content Management, Zope & Python Consulting
- http://www.simplistix.co.uk
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