python16_day34【设计模式】

一、简单工厂模式

# coding : utf-8
# create by ztypl on 2017/5/24

from abc import abstractmethod, ABCMeta

class Payment(metaclass=ABCMeta):
    @abstractmethod
    def pay(self, money):
        pass

class Alipay(Payment):
    def __init__(self, enable_yuebao=False):
        self.enable_yuebao = enable_yuebao

    def pay(self, money):
        if self.enable_yuebao:
            print("余额宝支付%s元" % money)
        else:
            print("支付宝支付%s元" % money)


class ApplePay(Payment):
    def pay(self, money):
        print("苹果支付%s元" % money)


class PaymentFactory:
    def create_payment(self, method):
        if method == "alipay":
            return Alipay()
        elif method == "applepay":
            return ApplePay()
        elif method == "yuebao":
            return Alipay(enable_yuebao=True)
        else:
            raise NameError(method)

f = PaymentFactory()
p = f.create_payment("alipay")
p.pay(100)

二、工厂模式

from abc import abstractmethod, ABCMeta


class Payment(metaclass=ABCMeta):
    @abstractmethod
    def pay(self, money):
        pass


class Alipay(Payment):
    def pay(self, money):
        print("支付宝支付%s元" % money)


class ApplePay(Payment):
    def pay(self, money):
        print("苹果支付%s元"%money)


class PaymentFactory(metaclass=ABCMeta):
    @abstractmethod
    def create_payment(self):
        pass


class AlipayFactory(PaymentFactory):
    def create_payment(self):
        return Alipay()

class ApplePayFactory(PaymentFactory):
    def create_payment(self):
        return ApplePay()




# 用户输入
# 支付宝，120

af = AlipayFactory()
ali = af.create_payment()
ali.pay(120)

三、抽象工厂模式

rom abc import abstractmethod, ABCMeta

# ------抽象产品------
class PhoneShell(metaclass=ABCMeta):
    @abstractmethod
    def show_shell(self):
        pass

class CPU(metaclass=ABCMeta):
    @abstractmethod
    def show_cpu(self):
        pass

class OS(metaclass=ABCMeta):
    @abstractmethod
    def show_os(self):
        pass


# ------抽象工厂------

class PhoneFactory(metaclass=ABCMeta):
    @abstractmethod
    def make_shell(self):
        pass

    @abstractmethod
    def make_cpu(self):
        pass

    @abstractmethod
    def make_os(self):
        pass


# ------具体产品------


class SmallShell(PhoneShell):
    def show_shell(self):
        print("普通手机小手机壳")

class BigShell(PhoneShell):
    def show_shell(self):
        print("普通手机大手机壳")

class AppleShell(PhoneShell):
    def show_shell(self):
        print("苹果手机壳")


class SnapDragonCPU(CPU):
    def show_cpu(self):
        print("骁龙CPU")


class MediaTekCPU(CPU):
    def show_cpu(self):
        print("联发科CPU")


class AppleCPU(CPU):
    def show_cpu(self):
        print("苹果CPU")


class Android(OS):
    def show_os(self):
        print("Android系统")


class IOS(OS):
    def show_os(self):
        print("iOS系统")


# ------具体工厂------

class MiFactory(PhoneFactory):
    def make_cpu(self):
        return SnapDragonCPU()

    def make_os(self):
        return Android()

    def make_shell(self):
        return BigShell()


class HuaweiFactory(PhoneFactory):
    def make_cpu(self):
        return MediaTekCPU()

    def make_os(self):
        return Android()

    def make_shell(self):
        return SmallShell()


class IPhoneFactory(PhoneFactory):
    def make_cpu(self):
        return AppleCPU()

    def make_os(self):
        return IOS()

    def make_shell(self):
        return AppleShell()


# ------客户端------


class Phone:
    def __init__(self, cpu, os, shell):
        self.cpu = cpu
        self.os = os
        self.shell = shell

    def show_info(self):
        print("手机信息:")
        self.cpu.show_cpu()
        self.os.show_os()
        self.shell.show_shell()


def make_phone(factory):
    cpu = factory.make_cpu()
    os = factory.make_os()
    shell = factory.make_shell()
    return Phone(cpu, os, shell)



p1 = make_phone(HuaweiFactory())
p1.show_info()

四、建筑者模式

from abc import abstractmethod, ABCMeta

#------产品------

class Player:
    def __init__(self, face=None, body=None, arm=None, leg=None):
        self.face = face
        self.arm = arm
        self.leg = leg
        self.body = body

    def __str__(self):
        return "%s, %s, %s, %s" % (self.face, self.arm, self.body, self.leg)


#------建造者------

class PlayerBuilder(metaclass=ABCMeta):
    @abstractmethod
    def build_face(self):
        pass
    @abstractmethod
    def build_arm(self):
        pass
    @abstractmethod
    def build_leg(self):
        pass
    @abstractmethod
    def build_body(self):
        pass
    @abstractmethod
    def get_player(self):
        pass


class BeautifulWomanBuilder(PlayerBuilder):
    def __init__(self):
        self.player = Player()
    def build_face(self):
        self.player.face = "漂亮脸蛋"
    def build_arm(self):
        self.player.arm="细胳膊"
    def build_body(self):
        self.player.body="细腰"
    def build_leg(self):
        self.player.leg="长腿"
    def get_player(self):
        return self.player


class PlayerDirector:
    def build_player(self, builder):
        builder.build_body()
        builder.build_arm()
        builder.build_leg()
        builder.build_face()
        return builder.get_player()


director = PlayerDirector()
builder = BeautifulWomanBuilder()
p = director.build_player(builder)
print(p)

五、单例模式

 需要先看懂__new__这个方法

from abc import abstractmethod, ABCMeta

class Singleton(object):
    def __new__(cls, *args, **kwargs):
        # 第一次返回_instance这个实后，后续返回相同的。
        if not hasattr(cls, "_instance"):
            cls._instance = super(Singleton, cls).__new__(cls)
        return cls._instance



class MyClass(Singleton):
    def __init__(self, name):
            self.name = name


a = MyClass("a")

print(a)
print(a.name)

b = MyClass('b')
#
print(b)
print(b.name)
b.name = 'xxx'
#
print(a)
print(a.name)

 六、适配器模式

# coding : utf-8
# create by ztypl on 2017/5/25

from abc import abstractmethod, ABCMeta


class Payment(metaclass=ABCMeta):
    @abstractmethod
    def pay(self, money):
        raise NotImplementedError


class Alipay(Payment):
    def pay(self, money):
        print("支付宝支付%s元"%money)


class ApplePay(Payment):
    def pay(self, money):
        print("苹果支付%s元"%money)

#------待适配类------

class WechatPay:
    def huaqian(self, money):
        print("微信支付%s元"%money)

# 方法一
#------类适配器------

class RealWeChatPay(Payment, WechatPay):
    def pay(self, money):
        return self.huaqian(money)

# 方法二
#------对象适配器------
class PayAdapter(Payment):
    def __init__(self, payment):
        self.payment = payment

    def pay(self, money):
        return self.payment.huaqian(money)

# client
RealWeChatPay().pay(100)
#PayAdapter(WechatPay()).pay(1000)

七、复合模式

# coding : utf-8
# create by ztypl on 2017/5/25

from abc import abstractmethod, ABCMeta

class Graphic(metaclass=ABCMeta):
    @abstractmethod
    def draw(self):
        pass

    @abstractmethod
    def add(self, graphic):
        pass

    def getchildren(self):
        pass

# 图元

class Point(Graphic):
    def __init__(self, x, y):
        self.x = x
        self.y = y

    def draw(self):
        print(self)

    def add(self, graphic):
        raise TypeError

    def getchildren(self):
        raise TypeError

    def __str__(self):
        return "点(%s, %s)" % (self.x, self.y)


class Line(Graphic):
    def __init__(self, p1, p2):
        self.p1 = p1
        self.p2 = p2

    def draw(self):
        print(self)

    def add(self, graphic):
        raise TypeError

    def getchildren(self):
        raise TypeError

    def __str__(self):
        return "线段[%s, %s]" % (self.p1, self.p2)


class Picture(Graphic):
    def __init__(self):
        self.children = []

    def add(self, graphic):
        self.children.append(graphic)

    def getchildren(self):
        return self.children

    def draw(self):
        print("------复合图形------")
        for g in self.children:
            g.draw()
        print("------END------")


pic1 = Picture()
point = Point(2,3)
pic1.add(point)
pic1.add(Line(Point(1,2), Point(4,5)))
pic1.add(Line(Point(0,1), Point(2,1)))

pic2 = Picture()
pic2.add(Point(-2,-1))
pic2.add(Line(Point(0,0), Point(1,1)))

pic = Picture()
pic.add(pic1)
pic.add(pic2)

pic.draw()
#pic1.draw()
#point.draw()

八、代理模式

# coding : utf-8
# create by ztypl on 2017/5/26

from abc import ABCMeta, abstractmethod

class Subject(metaclass=ABCMeta):
    @abstractmethod
    def get_content(self):
        pass
    def set_content(self, content):
        pass


class RealSubject(Subject):
    def __init__(self, filename):
        self.filename = filename
        print("读取%s文件内容"%filename)
        f = open(filename)
        self.content = f.read()
        f.close()

    def get_content(self):
        return self.content

    def set_content(self, content):
        f = open(self.filename, 'w')
        f.write(content)
        self.content = content
        f.close()



class ProxyA(Subject):
    def __init__(self, filename):
        self.subj = RealSubject(filename)

    def get_content(self):
        return self.subj.get_content()


#---虚代理
class ProxyB(Subject):
    def __init__(self, filename):
        self.filename = filename
        self.subj = None

    def get_content(self):
        if not self.subj:
            self.subj = RealSubject(self.filename)
        return self.subj.get_content()

x = ProxyB('abc.txt')
#print(x.get_content())




class ProxyC(Subject):
    def __init__(self, filename):
        self.subj = RealSubject(filename)

    def get_content(self):
        self.subj.get_content()

    def set_content(self, content):
        raise PermissionError

# filename = "abc.txt"
# username = input()
# if username!="alex":
#     p = ProxyC(filename)
# else:
#     p = ProxyA(filename)
#
# print(p.get_content())

九、链式模式

from abc import ABCMeta, abstractmethod

class Handler(metaclass=ABCMeta):
    @abstractmethod
    def handle_leave(self, day):
        pass

class GeneralManagerHandler(Handler):
    def handle_leave(self, day):
        if day < 10:
            print("总经理批准%d天假"%day)
        else:
            print("呵呵")

class DepartmentManagerHandler(Handler):
    def __init__(self):
        self.successor = GeneralManagerHandler()
    def handle_leave(self, day):
        if day < 7:
            print("部门经理批准%d天假"%day)
        else:
            print("部门经理无权准假")
            self.successor.handle_leave(day)


class ProjectDirectorHandler(Handler):
    def __init__(self):
        self.successor = DepartmentManagerHandler()
    def handle_leave(self, day):
        if day < 3:
            print("项目主管批准%d天假"%day)
        else:
            print("项目主管无权准假")
            self.successor.handle_leave(day)


day = 9
h = ProjectDirectorHandler()
h.handle_leave(day)

十、迭代模式

# coding : utf-8
# create by ztypl on 2017/5/27


class LinkList:
    """链表 头结点保存链表的长度"""
    class Node:
        def __init__(self, item=None):
            self.item = item
            self.next = None

    class LinkListIterator:
        def __init__(self, node):
            self.node = node
        def __next__(self):
            if self.node:
                cur_node = self.node
                self.node = cur_node.next
                return cur_node.item
            else:
                raise StopIteration
        def __iter__(self):
            return self

    def __init__(self, iterable=None):
        self.head = LinkList.Node(0)
        self.tail = self.head
        self.extend(iterable)

    def append(self, obj):
        s = LinkList.Node(obj)
        self.tail.next = s
        self.tail = s

    def extend(self, iterable):
        for obj in iterable:
            self.append(obj)
        self.head.item += len(iterable)

    def __iter__(self):
        return self.LinkListIterator(self.head.next)

    def __len__(self):
        return self.head.item

    def __str__(self):
        return "<<" + ", ".join(map(str, self)) + ">>"


li = [i for i in range(100)]
lk = LinkList(li)
print(lk)

十一、观察者模式(发布订阅)

# coding : utf-8
# create by ztypl on 2017/5/27

from abc import ABCMeta, abstractmethod

class Observer(metaclass=ABCMeta):
    @abstractmethod
    def update(self, notice):
        pass


class Notice:
    def __init__(self):
        self.observers = []

    def attach(self, obs):
        self.observers.append(obs)

    def detach(self, obs):
        self.observers.remove(obs)
        obs.company_info=None

    def notify(self):
        for obj in self.observers:
            print("---", type(self))
            obj.update(self)  #这个self是ManagerNotice对象

class ManagerNotice(Notice):
    def __init__(self, company_info=None):
        super().__init__()
        self.__company_info = company_info

    @property
    def company_info(self):
        return self.__company_info

    @company_info.setter
    def company_info(self, info):
        self.__company_info = info
        self.notify()


class Manager(Observer):
    def __init__(self):
        self.company_info = None

    def update(self, noti):
        self.company_info = noti.company_info  # 拿到最新消息保存到对象中(alex,wusir)


notice = ManagerNotice()

alex = Manager()
wusir = Manager()

# print(alex.company_info)
# print(wusir.company_info)

notice.attach(alex)
notice.attach(wusir)
#
notice.company_info="公司运行良好"
#
print(alex.company_info)
print(wusir.company_info)

notice.company_info="公司将要上市"
#
print(alex.company_info)
print(wusir.company_info)
# #
notice.detach(wusir)
# # #
notice.company_info="公司要破产了，赶快跑路"
# #
print(alex.company_info)
print(wusir.company_info)

十二、策略模式

# coding : utf-8
# create by ztypl on 2017/5/27

from abc import ABCMeta, abstractmethod
import random

class Sort(metaclass=ABCMeta):
    @abstractmethod
    def sort(self, data):
        pass


class QuickSort(Sort):
    def quick_sort(self, data, left, right):
        if left < right:
            mid = self.partition(data, left, right)
            self.quick_sort(data, left, mid - 1)
            self.quick_sort(data, mid + 1, right)

    def partition(self, data, left, right):
        tmp = data[left]
        while left < right:
            while left < right and data[right] >= tmp:
                right -= 1
            data[left] = data[right]
            while left < right and data[left] <= tmp:
                left += 1
            data[right] = data[left]
        data[left] = tmp
        return left

    def sort(self, data):
        print("快速排序")
        return self.quick_sort(data, 0, len(data) - 1)


class MergeSort(Sort):
    def merge(self, data, low, mid, high):
        i = low
        j = mid + 1
        ltmp = []
        while i <= mid and j <= high:
            if data[i] <= data[j]:
                ltmp.append(data[i])
                i += 1
            else:
                ltmp.append(data[j])
                j += 1

        while i <= mid:
            ltmp.append(data[i])
            i += 1

        while j <= high:
            ltmp.append(data[j])
            j += 1

        data[low:high + 1] = ltmp


    def merge_sort(self, data, low, high):
        if low < high:
            mid = (low + high) // 2
            self.merge_sort(data, low, mid)
            self.merge_sort(data, mid + 1, high)
            self.merge(data, low, mid, high)

    def sort(self, data):
        print("归并排序")
        return self.merge_sort(data, 0, len(data) - 1)


class Context:
    def __init__(self, data, strategy=None):
        self.data = data
        self.strategy = strategy

    def set_strategy(self, strategy):
        self.strategy = strategy

    def do_strategy(self):
        if self.strategy:
            self.strategy.sort(self.data)
        else:
            raise TypeError


li = list(range(100000))
random.shuffle(li)


context = Context(li, MergeSort())
context.do_strategy()
#print(context.data)

random.shuffle(context.data)

context.set_strategy(QuickSort())
context.do_strategy()

十三、模板方法模式

# coding : utf-8
# create by ztypl on 2017/5/27

from abc import ABCMeta, abstractmethod


class IOHandler(metaclass=ABCMeta):
    @abstractmethod
    def open(self, name):
        pass
    @abstractmethod
    def deal(self, change):
        pass
    @abstractmethod
    def close(self):
        pass
    def process(self, name, change):
        self.open(name)
        self.deal(change)
        self.close()

class FileHandler(IOHandler):
    def open(self, name):
        self.file = open(name,"w")

    def deal(self, change):
        self.file.write(change)

    def close(self):
        self.file.close()


f = FileHandler()
f.process("abc.txt", "Hello World")