python - AttributeError: 'child' object has no attribute '_name' -

i'm beginner python , trying understand class inheritance. when try following code error :

attributeerror: 'child' object has no attribute '_name' 

and here's code :

class parent:     def __init__(self):         self._name = "smith"      @property     def name(self):         return self._name  class child(parent):     def __init__(self, childname):         self._childname = childname      def getname(self):         return "child : {} .. parent : {}".format(self._childname, super().name)  def main():     dad = parent()     son = child("jack")     print(son.getname())  if __name__ == "__main__":     main() 

why ? understanding class inheritance in python correctly ?

your problem occurs here:

def getname(self):     return "child : {} .. parent : {}".format(self._childname, super().name) 

to more precise, super().name culprit: not super() useless , shall have called name() instead of name, if @ code of name(), notice uses variable _name.

however, _name initialized in parent's __init__ method. if want called, should call parent __init__ method in child's one, not done automagically. child __init__ method should be:

class child(parent):     def __init__(self, childname):         super().__init__()         self._childname = childname