[Zope-dev] 'NoneType' has no attribute 'lower'

[Larry Lay]

when sorting using <...tal:repeat subsection
python:sequence.sort(subsections,(('title','nocase','asc'),))">

 I get the following error:
 Module DocumentTemplate.sequence.SortEx, line 134 in nocase
AttributeError: 'NoneType' has no attribute 'lower'
 When I switch the 'nocase' to 'cmp' the sort defaults to sorting by order
of entry or something.
 Any help would be greatly appreciated.
 Thanks.
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