[Zope] not allowed to access unquote in this context while importing urllib

Hi, This one is from Zope newbie. I am trying to include python script to for decoding of the url's in Zope folder.(importing urllib) Whenever I try to test my python script the web interface asks me for admin password three times. It doesn't authenticate me with password and instead gives me error : Error Type: Unauthorized Error Value: You are not allowed to access unquote in this context I would be thankful for any pointers. TIA, Vikram