[Zope] Python script returning 0

Hi All Just wondering about this one... I'm writing python scripts that should return 1 if an sucessful and 0 if they fail. When I test them, they return 1 ok, but I never get the 0 value, zope just sits there and doesn't give a response... Using strings rather than integers fixes this. Is this intended behaviour? Is there a reason for this? Cheers ChrisK