of properties used in the "Rodelbahnbox" and "Gasthausbox".
The "to_python" method has to get a unicode argument.
"""
-import formencode
-import formencode.national
import datetime
import re
import xml.dom.minidom as minidom
from xml.parsers.expat import ExpatError
+import formencode
+import formencode.national
class NoneValidator(formencode.FancyValidator):