[mod_python] object type. why it not works?

I have a selfmade apache server, and I'm writing  a little web
application with mod python.

Using this def:

def testPython(contenuto):
  test="test"
  return type(test)

I obtain this error:

Mod_python error: "PythonHandler mod_python.publisher"

Traceback (most recent call last):

  File "/usr/lib64/python2.4/site-packages/mod_python/apache.py", line
299, in HandlerDispatch
    result = object(req)

  File "/usr/lib64/python2.4/site-packages/mod_python/publisher.py",
line 213, in handler
    published = publish_object(req, object)

  File "/usr/lib64/python2.4/site-packages/mod_python/publisher.py",
line 412, in publish_object
    return publish_object(req,util.apply_fs_data(object, req.form, req=req))

  File "/usr/lib64/python2.4/site-packages/mod_python/publisher.py",
line 412, in publish_object
    return publish_object(req,util.apply_fs_data(object, req.form, req=req))

  File "/usr/lib64/python2.4/site-packages/mod_python/util.py", line
401, in apply_fs_data
    fc = object.__init__.im_func.func_code

AttributeError: 'wrapper_descriptor' object has no attribute 'im_func'

Instead, on command line, the same istruction works well:

cloc3 at s939 /home/cloc3 $ python
Python 2.4.4 (#1, May 18 2007, 08:25:49)
[GCC 4.1.2 (Gentoo 4.1.2)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> test="test"
>>> type(test)
<type 'str'>


What may be wrong?