Roland Hedberg kirjoitti: > Hi! > > I'm having a bit of a problem with import. > > I'm writing a marshalling system that based on a specification will > create one or more files containing mostly class definitions. > > If there are more than one file created (and there are reasons for > creating more than one file in some instances) then they will import > each other since there may be or is interdependencies in between them. > > And this is where the going gets tough. > > Let's assume I have the following files: > > ------------- ONE.py -------------------- > > import TWO > > class Car: > def __init__(self): > self.color = None > > def set_color(self,v): > if isinstance(v,TWO.Black) or isinstance(v,TWO.White): > self.color = v > > class BaseColor: > def __init__(self): > pass > def __str__(self): > return self.color > > if __name__ == "__main__": > car = Car() > color = TWO.Black() > car.set_color(color) > print car.color > > -------------- TWO.py ------------------- > > import ONE > > class Black(ONE.BaseColor): > color = "Black" > def __init__(self): > ONE.BaseColor.__init__(self) > > class White(ONE.BaseColor): > color = "White" > def __init__(self): > ONE.BaseColor.__init__(self) > > ----------------------------------------- > > Now, running ONE.py causes no problem it will print "Black", but running > TWO.py I get: > AttributeError: 'module' object has no attribute 'BaseColor' > > So, how can this be solved if it can be ? > > To join ONE.py and TWO.py into one file could be a solution if there > where no other conditions (non-language based) that prevented it. > > -- Roland >
Maybe I'm missing something, but why is the class BaseColor in file ONE.py and not in TWO.py? Cheers, Jussi -- http://mail.python.org/mailman/listinfo/python-list
