我想更好地理解遗传。在下面的代码中,当我尝试打印friend.salary
时,它抛出一个AttributeError
。WorkingStudent
不是继承了Student
类的所有方法吗?你知道吗
class Student:
def __init__(self,name,school):
self.name = name
self.school = school
self.marks = []
def average(self):
return sum(self.marks)/len(self.marks)
def friend(self,friend_name):
return Student(friend_name, self.school)
anna = Student("Anna","MIT")
friend = anna.friend("Motilal")
#print (friend.name)
#print (friend.school)
class WorkingStudent(Student):
def __init__(self,name,school,salary):
super().__init__(self,name,school)
self.salary = salary
anna = WorkingStudent("Anna","SXS",25000)
anna.friend("Greg")
anna.marks.append(50)
print friend.salary
你应该修改你的源代码如下
编辑。所以代码现在可以工作了
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