kost BebiX wrote: > Hi everyone! > I just saw a bug (?) in bson.dbref:DBRef.__getattr__ >> Here's they're code: > def __getattr__(self, key): > return self.__kwargs[key] >> And when you do copy.deepcopy on that object it will raise you KeyError. So here's a small piece of code that reproduces the problem: >>from http://docs.python.org/reference/datamodel.html About __getattr__ "This method should return the (computed) attribute value or raise an AttributeError <http://docs.python.org/library/exceptions.html#exceptions.AttributeError> exception." The code you provided raises a KeyError thus methods such as 'getattr' will fail as they expect an AttributeError exception. JM