Python入门与进阶（9-15）

9-15 子类方法调用父类方法：super关键字
父类

class Human():
    sum = 0
    def __init__(self,name,age): 
        self.name = name
        self.age = age  

    def get_name(self):
        print(self.name)

    def do_homework(self):
        print('this is a paraent method')
    

from  test1 import Human
class Student(Human):       #student子类继承human父类
    # sum = 0  
    # def __init__(self,name,age): 
        # self.name = name
        # self.age = age  
        # self.__score = 0
        # self.__class__ .sum += 1 

    def do_homework(self):
        print('english homework')

student1 = Student('石敢当',18)
print(student1.sum)
print(Student.sum)
print(student1.name)
print(student1.age)
student1.get_name()


# 看下面的代码
from  test1 import Human
class Student(Human):       #student子类继承human父类
    # sum = 0  
    def __init__(self,school,name,age): 
        self.school = school  #school 属于子类，name，age属于父类，那么如何在子类里把name和age传给父类？
        #Human.__init__(self,name,age)#这样就实现了在子类里调用父类的构造函数
        super(Student,self).__init__(name,age)#这样就完成了调用父类的构造函数，super关键字指的就是父类human
        # self.name = name
        # self.age = age  
        # self.__score = 0
        # self.__class__ .sum += 1 

    def do_homework(self):
        super(Student,self).do_homework()#super不仅可以应用于构造函数，也可以应用于普通方法里
        print('english homework')

student1 = Student('人民路小学','石敢当',18)
student1.do_homework()#父类和子类相同的时候，有限打印子类，如图1
# print(student1.sum)
# print(Student.sum)
# print(student1.name)
# print(student1.age)
# student1.get_name()

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