Python:对象的增删改查

class Person:
    number = 0
    def __init__(self,name,gender,age):
        self.name = name
        self.gender = gender
        self.age = age
        Person.number+=1
    def displayPerson(self):
        print('name:',self.name,'Gender:',self.gender,'Age:',self.age)
    def displayNumber(self):
        print('Total person:',Person.number)
stu1 = Person('Liming','M',19)
stu2 = Person('Zhangli','F',20)
setattr(stu1,'score',90)
print(getattr(stu1,'score'))
print('The score of the first student:',stu1.score)
delattr(stu1,'score')
print(hasattr(stu1,'score'))