[Python知识库]CSDN的Python技能树体验三(面向对象编程)-哎嘿，今天的终结，明天的开始！

极简生活，极简编程，简到极致，就是完美！

今天学的也不是很多，明天应该能把web应用开发部分肝玩。真的写着写着就麻木了，我的，快乐呢！

同样资源在文末，话不多说，干吧!

# 1.类和对象的概念

class Student(object):
    # 初始化，name,age：对象实例化属性
    def __init__(self, name, age):
        self.name = name
        self.age = age

    def getName(self):
        return self.name

    def getAge(self):
        return self.age

stu1 = Student("张三", 18)
stu2 = Student("李四", 20)
stu_list = [stu1, stu2]

for stu in stu_list:
    print(stu.name)
    print(stu.age)

张三
18
李四
20

# 2.类成员
class Car:
    # 私有化静态属性
    _id = 0
    _name = ""
    _price = 0.0

    def __init__(self, cid, name, price):
        self._id = cid
        self._name = name
        self._price = price

    def __str__(self):
        return "编号:{}--名称:{}--价格:{}".format(self._id, self._name, self._price)


car1 = Car(1001, "丰田", 100000)
car2 = Car(1002, "本田", 150000)

print(car1)
print(car2)

编号:1001--名称:丰田--价格:100000
编号:1002--名称:本田--价格:150000

# 3.面向对象三要素：继承(),封装_，多态

# 4. 创建类：三角形类，内置了底边长，高，面积

class Triangle:
    # 普通静态属性
    bottom = 0
    height = 0

    def __init__(self, bottom, height):
        self.bottom = bottom
        self.height = height

    def getArea(self):
        return (self.bottom*self.height)/2


triange1 = Triangle(10, 20)
print(triange1.getArea())

100.0

# 5.抽象类:利用abc模块实现抽象类
import abc


class Person(metaclass=abc.ABCMeta):
    @abc.abstractmethod
    def say(self):
        pass


class Student(Person):
    def say(self):
        print("好好学习！")


class Teacher(Person):
    def say(self):
        print("教书育人！")


stu11 = Student()
tea11 = Teacher()

stu11.say()
tea11.say()

好好学习！
教书育人！

# 6.访问控制，使用”_“前缀实现，类似Java的private

# 7.获取对象信息：过滤掉没有name属性的对象

class NormalPerson():
    def __init__(self, name, age, sex):
        self.name = name
        self.age = age
        self.sex = sex


class SimplePerson():
    def __init__(self, age, sex):
        self.age = age
        self.sex = sex


p1 = NormalPerson("张三", 18, "男")
p2 = SimplePerson(0, "未知")

person_list = [p1, p2]

new_list = []
for person in person_list:
    if hasattr(person, 'name'):
        new_list.append(person)

print(new_list)

[<__main__.NormalPerson object at 0x0000029F445D71F0>]

资料在：面向对象编程.zip，明天见，Byebye!