面向对象

1 、接口类，抽象类

from abc import ABCMeta,abstractmethod
class Payment(metaclass=ABCMeta): 抽象类(接口类):
　　@abstractmethod
　　def pay(self): pass 制定了一个规范
　　@abstractmethod
　　def func(self):pass
class Alipay(Payment):
　　def __init__(self,money):
　　　　self.money = money
　　def pay(self):
　　　　print('使用支付宝支付了%s' %self.money)
class Jdpay(Payment):
　　def __init__(self, money):
　　　　self.money = money
　　def pay(self):
　　　　print('使用京东支付了%s' % self.money)
class Wechatpay(Payment):
　　def __init__(self,money):
　　　　self.money = money
　　def pay(self):
　　　　print('使用微信支付了%s' % self.money)
def pay(obj):
　　obj.pay()
w1 = Wechatpay(200)
a1 = Alipay(200)
j1 = Jdpay(100)
pay(a1) 归一化设计
w1 = Wechatpay(300)
w1.weixinpay()

2、属性

class Person:
    def __init__(self,name,age):
        self.name = name
        if type(age) is int:
            self.__age = age
        else:
            print('你输入的年龄的类型有误，请输入数字')
    @property
    def age(self):
        return self.__age
    @age.setter
    def age(self,a1):
        if type(a1) is int:
            self.__age = a1
        else:
            print('你输入的年龄的类型有误，请输入数字')
    @age.deleter
    def age(self):
        del self.__age
p1 = Person('alex',2)
# print(p1.__dict__)
print(p1.age)
p1.age = 30
print(p1.age)
# del p1.age
# print(p1.__dict__)

@property    啥时用：类似于计算周长、面积

@age.setter   更改私有变量属性值

@age.deleter  删除私有变量属性

3、反射

class Manager:
    OPERATE_DIC = [
        ('创造学生账号', 'create_student'),
        ('创建课程', 'create_course'),
        ('查看学生信息', 'check_student_info'),
    ]
    def __init__(self,name):
        self.name = name
    def create_student(self):
        print('创造学生账号')
    def create_course(self):
        print('创建课程')
    def check_student_info(self):
        print('查看学生信息')
class Student:
    OPERATE_DIC = [
        ('查看所有课程', 'check_course'),
        ('选择课程', 'choose_course'),
        ('查看已选择的课程', 'choosed_course')
    ]
    def __init__(self,name):
        self.name = name
    def check_course(self):
        print('查看所有课程')
    def choose_course(self):
        print('选择课程')
    def choosed_course(self):
        print('查看已选择的课程')
def login():
    username = input('name:')
    password = input('pwd:')
    with open('userinfo') as f:
        for line in f:
            usr,pwd,ident = line.strip().split('|')
            if usr ==username and pwd == password:
                print('登陆成功')
                return username,ident

import sys
def main():
    usr,id = login()
    print('usr,id:',usr,id)
    file = sys.modules['__main__']
    cls = getattr(file,id)
    obj = cls(usr)
    operate_dic = cls.OPERATE_DIC
    while True:
        for num,i in enumerate(operate_dic,1):
            print(num,i[0])
        choice = int(input('num<<<'))
        choice_item = operate_dic[choice-1]
        getattr(obj,choice_item[1])()
main()