>From: Javier
>Sent: Thu, May 13, 2010 8:03:40 PM
>
> Hi Dave,
>
> I use the generateDS scripts to generate the Python data structures from
> attached XSD files. Then I parse the attached XML file by the generated
> function. But it have the following error：
>
> Traceback (most recent call last):
> File "D:\simba\obiee_xmls\generateDS\genrateSimbaXml.py", line 11, in
> <module>
> scrObject =
> Backlog_by_Location_Detail.parse('../Current_Backlog_by_Location.xml')
> File "D:\simba\obiee_xmls\generateDS\Backlog_by_Location_Detail.py", line
> 2914, in parse
> rootObj.build(rootNode)
> File "D:\simba\obiee_xmls\generateDS\Backlog_by_Location_Detail.py", line
> 1003, in build
> self.buildChildren(child_, nodeName_)
> File "D:\simba\obiee_xmls\generateDS\Backlog_by_Location_Detail.py", line
> 1014, in buildChildren
> obj_.build(child_)
> File "D:\simba\obiee_xmls\generateDS\Backlog_by_Location_Detail.py", line
> 1758, in build
> self.buildChildren(child_, nodeName_)
> File "D:\simba\obiee_xmls\generateDS\Backlog_by_Location_Detail.py", line
> 1776, in buildChildren
> obj_.build(child_)
> File "D:\simba\obiee_xmls\generateDS\Backlog_by_Location_Detail.py", line
> 1441, in build
> self.buildChildren(child_, nodeName_)
> File "D:\simba\obiee_xmls\generateDS\Backlog_by_Location_Detail.py", line
> 1450, in buildChildren
> expr_ += text__content_.nodeValue
> TypeError: coercing to Unicode: need string or buffer, NoneType found
>
> I dont know reason. could you help me resolve this problem?
>
Javier -
Good to hear from you.
Let me make a few comments and suggestions that might help with
your issue.
1. I'm using version generateDS.py version 1.20f. If you are using
an earlier version, you may want to upgrade. I can't tell which
version you are using (the version is not in the comment line
generated), however, it seems like I recall fixing a problem
that had a similar signature. I'm not too sure about that.
2. Your XML schema uncovered a problem in the current version
(1.20f). When a complex type declares a child that is defined
as an (top level) element whose type is defined as a
complexType, then the generated code is trying to create an
instance of
In your schema, T_expr contains a declaration of a child of type
expr, but expr is a (top level) element which type is declared
as T_expr. In the build method, the generated code tries to
create an instace of class expr (which does not exist), whereas
it should create an instance of class T_expr.
I patched this with the following fix in the buildChildren
method in class T_expr:
--- tmp1sup.py~ 2010-05-14 08:48:51.000000000 -0700
+++ tmp1sup.py 2010-05-14 10:54:31.000000000 -0700
@@ -291,7 +291,8 @@
def buildChildren(self, child_, nodeName_):
if child_.nodeType == Node.ELEMENT_NODE and \
nodeName_ == 'expr':
- childobj_ = expr.factory()
+ childobj_ = T_expr.factory()
childobj_.build(child_)
obj_ =
self.mixedclass_(MixedContainer.CategoryComplex,
MixedContainer.TypeNone, 'expr', childobj_)
But, I'll have to look into how to fix this error in
generateDS.py.
3. generateDS.py is not generating code for the correct root
element given your instance document
(Current_Backlog_by_Location.xml). You can fix this in several
ways: (1) edit the parse function at the bottom of your
generated code; or (2) (copy and) write your own parse function
in a separate file in which you import one of the generated
files; or (3) use a parse function something like the following
to detect the root element in an instance document:
def get_root_tag(node):
tag = node.tagName
tags = tag.split(':')
if len(tags) > 1:
tag = tags[-1]
rootClass = None
if hasattr(supermod, tag):
rootClass = getattr(supermod, tag)
return tag, rootClass
def parse(inFilename):
doc = minidom.parse(inFilename)
rootNode = doc.documentElement
rootTag, rootClass = get_root_tag(rootNode)
rootObj = rootClass.factory()
rootObj.build(rootNode)
# Enable Python to collect the space used by the DOM.
doc = None
sys.stdout.write('<?xml version="1.0" ?>\n')
rootObj.export(sys.stdout, 0, name_=rootTag,
namespacedef_='')
doc = None
return rootObj
I plan to do a bit of work on this last problem, but it might
take me a bit of time.
Hope that something above is of some help to you. I'll
report back when I have a fix for that problem I mentioned
in point 2. above.
- Dave
--
Dave Kuhlman
http://www.rexx.com/~dkuhlman
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