Day_6python clase_básica

(1)

El proceso de memoria es ligeramente

(2)

class Car:
    def __init__(self, motor, chassis, seat, shell):
        self.motor = motor
        self.chassis = chassis
        self.seat = seat
        self.shell = shell

    def run(self):
        self.motor.work()
        self.chassis.work()
        self.seat.work()
        self.shell.work()


class Motor:
    def work(self):
        print("motors' working status is alright")


class Chassis:
    def work(self):
        print("chassis' working status is alright")


class Seat:
    def work(self):
        print("seats' working status is alright")


class Shell:
    def work(self):
        print("shell's  working status is alright")


motor = Motor()
chassis = Chassis()
seat = Seat()
shell = Shell()
car = Car(motor, chassis, seat, shell)
car.run()

(3)

class ComputerFactory:

    __obj = None
    __init_flag = True

    def creat_computer(self, brand):
        if brand == "联想":
            return LianXiang()
        if brand == "华硕":
            return HuaShuo()
        if brand == "神舟":
            return ShenZhou()
        else:
            return "未知品牌"

    def __new__(cls, *args, **kwargs):
        if cls.__obj is None:
            cls.__obj = object.__new__(cls)

        return cls.__obj

    def __init__(self):
        if ComputerFactory.__init_flag:
            print("init.....")
            ComputerFactory.__init_flag = False


class Computer:
    def __init__(self, cpu=None, screen=None):
        self.cpu = cpu
        self.screen = screen

    def calculate(self):
        print('computer运算中')


class LianXiang(Computer):
    def calculate(self):
        print("联想computer在计算")

    def __init__(self):
        Computer.__init__(self)


class HuaShuo(Computer):
    def calculate(self):
        print("华硕computer在计算")

    def __init__(self):
        Computer.__init__(self)


class ShenZhou(Computer):
    def calculate(self):
        print("神舟computer在计算")

    def __init__(self):
        Computer.__init__(self)


a1 = ComputerFactory()
a2 = ComputerFactory()
print(a1, a2)
l1 = a1.creat_computer("联想")
l1.calculate()

(4)

class Employee:

    id = 1001

    def __init__(self, name, salary):
        self.id = Employee.id
        Employee.id += 1
        self.name = name
        self.__salary = salary

    def __add__(self, other):
        if isinstance(other, Employee):
            return "薪水和为{}".format(self.__salary + other.__salary)
        else:
            return "不是同类对象，不能相加"

    @property
    def salary(self):
        return self.__salary

    @salary.setter
    def salary(self, salary):
        if 1000 <= salary <= 50000:
            self.__salary = salary
        else:
            print("工资不在要求范围内")


e1 = Employee('甘雨', 10000)
e2 = Employee('王小美', 48000)
print(e1.id, e2.id)
print(e1 + e2)
e1.set_salary = 42000
print(e1.salary)