Floyd May wrote:
How can I use a set object within a page template?
When I attempt to create a set (e.g. tal:define="myset
python:set(some_list)"), zope complains that the name 'set' is not
defined.
If you only need to read from some native python objects, you can make a
simple wrapper. You can wrap a set() in this class and return it from
python.
_marker = []
class Zello:
"""
Zello (Zellophane)
A minimal wrapper for viewing native python objects in pagetemplates.
If you try to view attributes on simple Python objects you get a
Permission
error. This is pretty simple to fix in your own objects by setting:
__allow_access_to_unprotected_subobjects__ = 1
For some built in objects you cannot do this. This class just puts a
transparent wrapper around such objects::
wrapped = Zello(datetime(2005, 10, 12))
So you can write this zpt code:
<span tal:replace="wrapped/year" />
If you wrap a Zope object with it, you basically remove all security
checkcs. So don't do that.
"""
__allow_access_to_unprotected_subobjects__ = 1
def __init__(self, obj):
self._obj = obj
def __getattr__(self, attr, default=_marker):
if default is _marker:
return getattr(self._obj, attr)
else:
return getattr(self._obj, attr, default)
def __getitem__(self, key):
return self._obj[key]
--
hilsen/regards Max M, Denmark
http://www.mxm.dk/
IT's Mad Science
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