```
class A(object):
def __init__(self,name):
self.name = name
def func(self):
return 'from AA'
class B(A):
def __init__(self,name,age,sex):
super().__init__(name)
self.age = age
self.sex = sex
a = A('Parker')
b = B('Alice',23,'female')
print(a.name,b.age,b.func())
```
