python的类

1.基本语法

2.实战演练

class Student:
    """
    学生类
    """
    #类变量：学生数量
    total_cnt = 0
    def __init__(self,name,age):
        """
        初始化方法
        :param name:姓名
        :param age:年龄
        """
        self.name = name
        self.age = age
        Student.total_cnt +=1

    def set_grade(self,grade):
        """
        设定学生成绩
        :param grade:成绩
        :return:
        """
        self.grade = grade

    def print_info(self):
        """
        打印学生信息
        :return:
        """
        print("student_info",self.name,self.age,self.grade)
#创建两个类的实例
s1 = Student("张三",20)
s2 = Student("李四",25)

#打印类变量
print(Student.total_cnt)

#设定学生成绩
s1.set_grade(88)
s2.set_grade(99)

s1.print_info()
s2.print_info()

转载于:https://my.oschina.net/u/3055497/blog/3083266