[pyxb-users] Unable to generate XML from python classes

[Serge G. <ser...@gm...>]

Hi,

I am trying to use PyXB (1.2.3) to produce XML from python object.
I have a simple xsd schema:

<?xml version="1.0" encoding="UTF-8"?>
<xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema">

<xsd:complexType name="Items">
  <xsd:sequence>
     <xsd:element name="item" type="Item" maxOccurs="unbounded"/>
  </xsd:sequence>
</xsd:complexType>

<xsd:complexType name="Item">
  <xsd:attribute name="name" type="xsd:string" use="required"/>
  <xsd:attribute name="price" type="xsd:string" use="required"/>
</xsd:complexType>

<xsd:element name="items" type="Items"/>

</xsd:schema>


I generated bindings with the command:
pyxbgen" -u items.xsd -m items

I am able to read an xml (with CreateFromDocument) and get an Items object.

Then if try to build the document from python to generate XML, I get an
error.
I use the following script:

import items

i1 = items.Item(name="cheese", price="50")
i2 = items.Item(name="parrot", price="200")
inv = items.Items([i1, i2])
print(inv.tomxl())

Running this script gives me pyxb.exceptions_.MixedContentError: Invalid
non-element content
Here is the stack trace:
Traceback (most recent call last):
  File "test2.py", line 5, in <module>
    inv = items.Items([i1, i2])
  File "C:\Documents and Settings\sgadioux\Application
Data\Python\Python27\site-packages\pyxb\binding\basis.py", line 2060, in
__init__
    self.extend(args, _from_xml=from_xml, _location=location)
  File "C:\Documents and Settings\sgadioux\Application
Data\Python\Python27\site-packages\pyxb\binding\basis.py", line 2517, in
extend
    [ self.append(_v, _fallback_namespace=_fallback_namespace,
_from_xml=_from_xml, _location=_location) for _v in value_list ]
  File "C:\Documents and Settings\sgadioux\Application
Data\Python\Python27\site-packages\pyxb\binding\basis.py", line 2505, in
append
    raise pyxb.MixedContentError(self, value, location)
pyxb.exceptions_.MixedContentError: Invalid non-element content

What am I doing wrong ? Do I need to specify a namespace in my xsd ?

Thanks in advance,
Serge