Python类的继承

class 子类名(父类1, 父类2, ...., 父类n):
    pass
    
# 通过类提供的__bases__属性可以查看到子类直接继承的所有父类，子类名.__bases__

class cartInfoTest(unittest.TestCase):   # 定义一个子类cartInfoTest， 继承父类unittest.TestCase类
    # 购物车的测试用例
    storeID = [1, ‘北京XX‘, 11, ‘XX店‘, ‘116.316839‘, ‘39.982926‘, ‘6a84ee3d9eb72755500fe083956628d1@MS0xMTItMQ‘, ‘00dfb855c6465c81199a21672fca1f18@MTM3Mi02OTYzMg‘, ‘2‘]
    userInfo = ("0f776f21-4455-4342-852c-ba8d802338d3", "60E7BD2AF307BCBA39926EC51D165429CF17DDE262FAA204E701D2BAE7DF1BEF0B9AFC57D96EDE299471E2BD9F905CDE081D053C1FEF126BA9C0173F585F0B3469B30A2965B1651600679E68E610E197EF72EAFEC66D6184F1022DB5FE38B223768D1D7D029616164F05DA3128473184212D42152629DB9E3E1C800A5AD65469")
    def test_cart(self,):
        """测试name_function.py"""
        rootURL = cr.INTERFACE_CARTINFO
        headers = cr.homePageInterfaceTestHeader(self.storeID, token=self.userInfo[0], ticketName=self.userInfo[1])
        param = cr.cartInfoTestParams(self.storeID)
        data = "param=%s" % json.dumps(param, ensure_ascii=False)
        r = requests.post(rootURL, headers=headers, data=data)
        
        # 调用继承的父类unittest.TestCase的方法：assertEqual
        self.assertEqual(‘0000‘, r.json()[‘code‘], r.json()[‘result‘])
        # unittest.TestCase.assertEqual(self, 1, 2)  #“基类名.方法名()”
if __name__ == ‘__main__‘:
    unittest.main()

class Father:

    def hobby(self):
        print(f"{Father.__name__} love to play video game.")

    def cook(self):
        print(f"{Father.__name__} love to cook anything.")


class Mother:

    def cook(self):
        print(f"{Mother.__name__} love to cook anything.")

    def hobby(self):
        print(f"{Mother.__name__} love to play video game.")


class Son(Father, Mother):
    pass


if __name__ == ‘__main__‘:
    son = Son()
    son.cook()
    son.hobby()
# 执行结果：
Father love to cook anything. 
Father love to play video game.

#更换下继承顺序
class Son(Mother, Father):
    pass


if __name__ == ‘__main__‘:
    son = Son()
    son.cook()
    son.hobby()
#执行结果
Mother love to cook anything. 
Mother love to play video game.

class CheckPoint(unittest.TestCase):

    def __init__(self,  methodName=‘runTest‘):
        # 方法一：经典类写法，需要把父类的拿过来， 把父类执行一遍
        #unittest.TestCase.__init__(self, methodName)  
        """方法二：super的作用Man继承父类的构造函数,
                        优点1：父类名称改变后，此处不用同步修改，
                        优点2：多继承时，不用每个都写一遍"""
        #super(CheckPoint, self).__init__(methodName)
        #第三种写法（推荐）：Python3的写法，与第二种等价
        super().__init__(methodName)
        self._testMethodName = methodName
        self._flag = 0
        self.msg = []

    # 基本的布尔断言：要么正确，要么错误的验证
    def checkAssertEqual(self, arg1, arg2, msg=None):
        """    验证arg1=arg2，不等则fail"""
        try:
            self.assertEqual(arg1, arg2, msg)
        except Exception as e:
            self._flag += 1
            self.msg.append("{}".format(msg))
            print(e)