class_10:类和继承

类 

class Student:
    def __init__(self,name,student_id):
        self.name = name
        self.id = student_id
        self.grade ={"语文": 0 ,"数学":0 ,"英语":0}

    def SetGrade(self,course , grade):
        if course in self.grade:
            self.grade[course] = grade

    def PrintInfo(self):
        print(f"学生{self.name} (学号：{self.id}) 成绩：")
        for course in self.grade.items():
            print(f"{course[0]} ： {course[1]}分")
cheng = Student("小花",1001)
cheng.SetGrade("语文",90)
cheng.SetGrade("数学",99)
cheng.SetGrade("英语",98)
cheng.PrintInfo()
#print(f"{cheng.name}同学的ID 是{cheng.id} 成绩：{cheng.grade["语文"]}")

继承 

class Employee:
    def __init__(self,name,id):
        self.name = name
        self.id = id
    def Print(self):
        print(f"{self.name} {self.id}")

class FullTimeEmployee(Employee):
    def __init__(self,name,id,mothsalary):
        super().__init__(name,id)
        self.salary = mothsalary
    def calcultae_salary(self):
        return self.salary

class PartTimeEmployee(Employee):
    def __init__(self,name,id,daysalary,workdays):
        super().__init__(name,id)
        self.daysalary = daysalary
        self.workdays = workdays
    def calcultae_salary(self):
        return self.daysalary * self.workdays

chen = FullTimeEmployee("小陈",1001,10000)
wang = PartTimeEmployee("小王",1002,200,23)

chen.Print()
print(f"月薪为：{chen.calcultae_salary()}")
wang.Print()
print(f"月薪为：{wang.calcultae_salary()}")