[Zope] Seing if an attribute exist in an ObjectManager

I have set an image in an ObjectManager object like this: imID = 'laeringsGraf' self._setObject(imID, OFS.Image.Image(imID,'Lærings graf','')) self._getOb(imID).update_data(data) I only want to draw it if it isn't there allready How do I then check if it allready exists? I guess it's something like:: if not hasattr(self, imID): ?? or if not self._has_attr(imID) regarsd Max M