Mod_python error: "PythonHandler mod_python.publisher"

Traceback (most recent call last):

  File "/usr/local/lib/python2.7/dist-packages/mod_python/apache.py", line 398, in HandlerDispatch
    result = obj(req)

  File "/usr/local/lib/python2.7/dist-packages/mod_python/publisher.py", line 213, in handler
    module = page_cache[req]

  File "/usr/local/lib/python2.7/dist-packages/mod_python/cache.py", line 89, in __getitem__
    return self._checkitem(name)[2]

  File "/usr/local/lib/python2.7/dist-packages/mod_python/cache.py", line 131, in _checkitem
    value = self.build(key, name, opened, entry)

  File "/usr/local/lib/python2.7/dist-packages/mod_python/publisher.py", line 86, in build
    return ModuleCache.build(self, key, req, opened, entry)

  File "/usr/local/lib/python2.7/dist-packages/mod_python/cache.py", line 380, in build
    exec(opened_as_str, module.__dict__)

  File "<string>", line 7, in <module>

  File "/var/www/reshuege/module/mysql_session.py", line 41, in <module>
    tempdir = tempfile.gettempdir()

  File "/usr/lib/python2.7/tempfile.py", line 261, in gettempdir
    tempdir = _get_default_tempdir()

  File "/usr/lib/python2.7/tempfile.py", line 208, in _get_default_tempdir
    ("No usable temporary directory found in %s" % dirlist))

IOError: [Errno 2] No usable temporary directory found in ['/tmp', '/var/tmp', '/usr/tmp', '/']