python - Override a field in parent class with property in child class -
where looks this: class a(object): def __init__(self, val): self.x=val self.y=42 # other fields class b(object): def __init__(self): self.a=22 # other fields class c(a,b): def __init__(self, val): super(c,self).__init__(val) @property def x(self): # if a.x none return value can compute a.y , b.a # if a.x not none return @x.setter def x(self, val): # set field value sometimes want set assumed value x hand, in case use a . in other cases want use more complicated approach involves computing a.x 's value on basis of information organized b . idea in code make c class can a (in terms of x field) doesn't need field value set hand, instead gets derived. what can't figure out how have c.x property shadow a.x field in sensible way. the line self.x = val in a.__init__ method invoke c.x setter . have handled here. handling per instance attributes here,
