py3 metaclass hack

gistfile1.py

def py3metafix(cls):                                                                 
    if not py3:                                                                      
        return cls                                                                   
    else:                                                                            
        newcls = cls.__metaclass__(cls.__name__, (cls,), {})                         
        newcls.__doc__ = cls.__doc__                                                         
        return newcls