python16_day34【设计模式】

一、简单工厂模式

 1 # coding : utf-8
 2 # create by ztypl on 2017/5/24
 3 
 4 from abc import abstractmethod, ABCMeta
 5 
 6 class Payment(metaclass=ABCMeta):
 7     @abstractmethod
 8     def pay(self, money):
 9         pass
10 
11 class Alipay(Payment):
12     def __init__(self, enable_yuebao=False):
13         self.enable_yuebao = enable_yuebao
14 
15     def pay(self, money):
16         if self.enable_yuebao:
17             print("余额宝支付%s元" % money)
18         else:
19             print("支付宝支付%s元" % money)
20 
21 
22 class ApplePay(Payment):
23     def pay(self, money):
24         print("苹果支付%s元" % money)
25 
26 
27 class PaymentFactory:
28     def create_payment(self, method):
29         if method == "alipay":
30             return Alipay()
31         elif method == "applepay":
32             return ApplePay()
33         elif method == "yuebao":
34             return Alipay(enable_yuebao=True)
35         else:
36             raise NameError(method)
37 
38 f = PaymentFactory()
39 p = f.create_payment("alipay")
40 p.pay(100)
View Code

二、工厂模式

 1 from abc import abstractmethod, ABCMeta
 2 
 3 
 4 class Payment(metaclass=ABCMeta):
 5     @abstractmethod
 6     def pay(self, money):
 7         pass
 8 
 9 
10 class Alipay(Payment):
11     def pay(self, money):
12         print("支付宝支付%s元" % money)
13 
14 
15 class ApplePay(Payment):
16     def pay(self, money):
17         print("苹果支付%s元"%money)
18 
19 
20 class PaymentFactory(metaclass=ABCMeta):
21     @abstractmethod
22     def create_payment(self):
23         pass
24 
25 
26 class AlipayFactory(PaymentFactory):
27     def create_payment(self):
28         return Alipay()
29 
30 class ApplePayFactory(PaymentFactory):
31     def create_payment(self):
32         return ApplePay()
33 
34 
35 
36 
37 # 用户输入
38 # 支付宝，120
39 
40 af = AlipayFactory()
41 ali = af.create_payment()
42 ali.pay(120)
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三、抽象工厂模式

  1 rom abc import abstractmethod, ABCMeta
  2 
  3 # ------抽象产品------
  4 class PhoneShell(metaclass=ABCMeta):
  5     @abstractmethod
  6     def show_shell(self):
  7         pass
  8 
  9 class CPU(metaclass=ABCMeta):
 10     @abstractmethod
 11     def show_cpu(self):
 12         pass
 13 
 14 class OS(metaclass=ABCMeta):
 15     @abstractmethod
 16     def show_os(self):
 17         pass
 18 
 19 
 20 # ------抽象工厂------
 21 
 22 class PhoneFactory(metaclass=ABCMeta):
 23     @abstractmethod
 24     def make_shell(self):
 25         pass
 26 
 27     @abstractmethod
 28     def make_cpu(self):
 29         pass
 30 
 31     @abstractmethod
 32     def make_os(self):
 33         pass
 34 
 35 
 36 # ------具体产品------
 37 
 38 
 39 class SmallShell(PhoneShell):
 40     def show_shell(self):
 41         print("普通手机小手机壳")
 42 
 43 class BigShell(PhoneShell):
 44     def show_shell(self):
 45         print("普通手机大手机壳")
 46 
 47 class AppleShell(PhoneShell):
 48     def show_shell(self):
 49         print("苹果手机壳")
 50 
 51 
 52 class SnapDragonCPU(CPU):
 53     def show_cpu(self):
 54         print("骁龙CPU")
 55 
 56 
 57 class MediaTekCPU(CPU):
 58     def show_cpu(self):
 59         print("联发科CPU")
 60 
 61 
 62 class AppleCPU(CPU):
 63     def show_cpu(self):
 64         print("苹果CPU")
 65 
 66 
 67 class Android(OS):
 68     def show_os(self):
 69         print("Android系统")
 70 
 71 
 72 class IOS(OS):
 73     def show_os(self):
 74         print("iOS系统")
 75 
 76 
 77 # ------具体工厂------
 78 
 79 class MiFactory(PhoneFactory):
 80     def make_cpu(self):
 81         return SnapDragonCPU()
 82 
 83     def make_os(self):
 84         return Android()
 85 
 86     def make_shell(self):
 87         return BigShell()
 88 
 89 
 90 class HuaweiFactory(PhoneFactory):
 91     def make_cpu(self):
 92         return MediaTekCPU()
 93 
 94     def make_os(self):
 95         return Android()
 96 
 97     def make_shell(self):
 98         return SmallShell()
 99 
100 
101 class IPhoneFactory(PhoneFactory):
102     def make_cpu(self):
103         return AppleCPU()
104 
105     def make_os(self):
106         return IOS()
107 
108     def make_shell(self):
109         return AppleShell()
110 
111 
112 # ------客户端------
113 
114 
115 class Phone:
116     def __init__(self, cpu, os, shell):
117         self.cpu = cpu
118         self.os = os
119         self.shell = shell
120 
121     def show_info(self):
122         print("手机信息:")
123         self.cpu.show_cpu()
124         self.os.show_os()
125         self.shell.show_shell()
126 
127 
128 def make_phone(factory):
129     cpu = factory.make_cpu()
130     os = factory.make_os()
131     shell = factory.make_shell()
132     return Phone(cpu, os, shell)
133 
134 
135 
136 p1 = make_phone(HuaweiFactory())
137 p1.show_info()
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四、建筑者模式

 1 from abc import abstractmethod, ABCMeta
 2 
 3 #------产品------
 4 
 5 class Player:
 6     def __init__(self, face=None, body=None, arm=None, leg=None):
 7         self.face = face
 8         self.arm = arm
 9         self.leg = leg
10         self.body = body
11 
12     def __str__(self):
13         return "%s, %s, %s, %s" % (self.face, self.arm, self.body, self.leg)
14 
15 
16 #------建造者------
17 
18 class PlayerBuilder(metaclass=ABCMeta):
19     @abstractmethod
20     def build_face(self):
21         pass
22     @abstractmethod
23     def build_arm(self):
24         pass
25     @abstractmethod
26     def build_leg(self):
27         pass
28     @abstractmethod
29     def build_body(self):
30         pass
31     @abstractmethod
32     def get_player(self):
33         pass
34 
35 
36 class BeautifulWomanBuilder(PlayerBuilder):
37     def __init__(self):
38         self.player = Player()
39     def build_face(self):
40         self.player.face = "漂亮脸蛋"
41     def build_arm(self):
42         self.player.arm="细胳膊"
43     def build_body(self):
44         self.player.body="细腰"
45     def build_leg(self):
46         self.player.leg="长腿"
47     def get_player(self):
48         return self.player
49 
50 
51 class PlayerDirector:
52     def build_player(self, builder):
53         builder.build_body()
54         builder.build_arm()
55         builder.build_leg()
56         builder.build_face()
57         return builder.get_player()
58 
59 
60 director = PlayerDirector()
61 builder = BeautifulWomanBuilder()
62 p = director.build_player(builder)
63 print(p)
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五、单例模式

 1  需要先看懂__new__这个方法
 2 
 3 from abc import abstractmethod, ABCMeta
 4 
 5 class Singleton(object):
 6     def __new__(cls, *args, **kwargs):
 7         # 第一次返回_instance这个实后，后续返回相同的。
 8         if not hasattr(cls, "_instance"):
 9             cls._instance = super(Singleton, cls).__new__(cls)
10         return cls._instance
11 
12 
13 
14 class MyClass(Singleton):
15     def __init__(self, name):
16             self.name = name
17 
18 
19 a = MyClass("a")
20 
21 print(a)
22 print(a.name)
23 
24 b = MyClass('b')
25 #
26 print(b)
27 print(b.name)
28 b.name = 'xxx'
29 #
30 print(a)
31 print(a.name)
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 六、适配器模式

 1 # coding : utf-8
 2 # create by ztypl on 2017/5/25
 3 
 4 from abc import abstractmethod, ABCMeta
 5 
 6 
 7 class Payment(metaclass=ABCMeta):
 8     @abstractmethod
 9     def pay(self, money):
10         raise NotImplementedError
11 
12 
13 class Alipay(Payment):
14     def pay(self, money):
15         print("支付宝支付%s元"%money)
16 
17 
18 class ApplePay(Payment):
19     def pay(self, money):
20         print("苹果支付%s元"%money)
21 
22 #------待适配类------
23 
24 class WechatPay:
25     def huaqian(self, money):
26         print("微信支付%s元"%money)
27 
28 # 方法一
29 #------类适配器------
30 
31 class RealWeChatPay(Payment, WechatPay):
32     def pay(self, money):
33         return self.huaqian(money)
34 
35 # 方法二
36 #------对象适配器------
37 class PayAdapter(Payment):
38     def __init__(self, payment):
39         self.payment = payment
40 
41     def pay(self, money):
42         return self.payment.huaqian(money)
43 
44 # client
45 RealWeChatPay().pay(100)
46 #PayAdapter(WechatPay()).pay(1000)
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七、复合模式

 1 # coding : utf-8
 2 # create by ztypl on 2017/5/25
 3 
 4 from abc import abstractmethod, ABCMeta
 5 
 6 class Graphic(metaclass=ABCMeta):
 7     @abstractmethod
 8     def draw(self):
 9         pass
10 
11     @abstractmethod
12     def add(self, graphic):
13         pass
14 
15     def getchildren(self):
16         pass
17 
18 # 图元
19 
20 class Point(Graphic):
21     def __init__(self, x, y):
22         self.x = x
23         self.y = y
24 
25     def draw(self):
26         print(self)
27 
28     def add(self, graphic):
29         raise TypeError
30 
31     def getchildren(self):
32         raise TypeError
33 
34     def __str__(self):
35         return "点(%s, %s)" % (self.x, self.y)
36 
37 
38 class Line(Graphic):
39     def __init__(self, p1, p2):
40         self.p1 = p1
41         self.p2 = p2
42 
43     def draw(self):
44         print(self)
45 
46     def add(self, graphic):
47         raise TypeError
48 
49     def getchildren(self):
50         raise TypeError
51 
52     def __str__(self):
53         return "线段[%s, %s]" % (self.p1, self.p2)
54 
55 
56 class Picture(Graphic):
57     def __init__(self):
58         self.children = []
59 
60     def add(self, graphic):
61         self.children.append(graphic)
62 
63     def getchildren(self):
64         return self.children
65 
66     def draw(self):
67         print("------复合图形------")
68         for g in self.children:
69             g.draw()
70         print("------END------")
71 
72 
73 pic1 = Picture()
74 point = Point(2,3)
75 pic1.add(point)
76 pic1.add(Line(Point(1,2), Point(4,5)))
77 pic1.add(Line(Point(0,1), Point(2,1)))
78 
79 pic2 = Picture()
80 pic2.add(Point(-2,-1))
81 pic2.add(Line(Point(0,0), Point(1,1)))
82 
83 pic = Picture()
84 pic.add(pic1)
85 pic.add(pic2)
86 
87 pic.draw()
88 #pic1.draw()
89 #point.draw()
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八、代理模式

 1 # coding : utf-8
 2 # create by ztypl on 2017/5/26
 3 
 4 from abc import ABCMeta, abstractmethod
 5 
 6 class Subject(metaclass=ABCMeta):
 7     @abstractmethod
 8     def get_content(self):
 9         pass
10     def set_content(self, content):
11         pass
12 
13 
14 class RealSubject(Subject):
15     def __init__(self, filename):
16         self.filename = filename
17         print("读取%s文件内容"%filename)
18         f = open(filename)
19         self.content = f.read()
20         f.close()
21 
22     def get_content(self):
23         return self.content
24 
25     def set_content(self, content):
26         f = open(self.filename, 'w')
27         f.write(content)
28         self.content = content
29         f.close()
30 
31 
32 
33 class ProxyA(Subject):
34     def __init__(self, filename):
35         self.subj = RealSubject(filename)
36 
37     def get_content(self):
38         return self.subj.get_content()
39 
40 
41 #---虚代理
42 class ProxyB(Subject):
43     def __init__(self, filename):
44         self.filename = filename
45         self.subj = None
46 
47     def get_content(self):
48         if not self.subj:
49             self.subj = RealSubject(self.filename)
50         return self.subj.get_content()
51 
52 x = ProxyB('abc.txt')
53 #print(x.get_content())
54 
55 
56 
57 
58 class ProxyC(Subject):
59     def __init__(self, filename):
60         self.subj = RealSubject(filename)
61 
62     def get_content(self):
63         self.subj.get_content()
64 
65     def set_content(self, content):
66         raise PermissionError
67 
68 # filename = "abc.txt"
69 # username = input()
70 # if username!="alex":
71 #     p = ProxyC(filename)
72 # else:
73 #     p = ProxyA(filename)
74 #
75 # print(p.get_content())
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九、链式模式

 1 from abc import ABCMeta, abstractmethod
 2 
 3 class Handler(metaclass=ABCMeta):
 4     @abstractmethod
 5     def handle_leave(self, day):
 6         pass
 7 
 8 class GeneralManagerHandler(Handler):
 9     def handle_leave(self, day):
10         if day < 10:
11             print("总经理批准%d天假"%day)
12         else:
13             print("呵呵")
14 
15 class DepartmentManagerHandler(Handler):
16     def __init__(self):
17         self.successor = GeneralManagerHandler()
18     def handle_leave(self, day):
19         if day < 7:
20             print("部门经理批准%d天假"%day)
21         else:
22             print("部门经理无权准假")
23             self.successor.handle_leave(day)
24 
25 
26 class ProjectDirectorHandler(Handler):
27     def __init__(self):
28         self.successor = DepartmentManagerHandler()
29     def handle_leave(self, day):
30         if day < 3:
31             print("项目主管批准%d天假"%day)
32         else:
33             print("项目主管无权准假")
34             self.successor.handle_leave(day)
35 
36 
37 day = 9
38 h = ProjectDirectorHandler()
39 h.handle_leave(day)
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十、迭代模式

 1 # coding : utf-8
 2 # create by ztypl on 2017/5/27
 3 
 4 
 5 class LinkList:
 6     """链表 头结点保存链表的长度"""
 7     class Node:
 8         def __init__(self, item=None):
 9             self.item = item
10             self.next = None
11 
12     class LinkListIterator:
13         def __init__(self, node):
14             self.node = node
15         def __next__(self):
16             if self.node:
17                 cur_node = self.node
18                 self.node = cur_node.next
19                 return cur_node.item
20             else:
21                 raise StopIteration
22         def __iter__(self):
23             return self
24 
25     def __init__(self, iterable=None):
26         self.head = LinkList.Node(0)
27         self.tail = self.head
28         self.extend(iterable)
29 
30     def append(self, obj):
31         s = LinkList.Node(obj)
32         self.tail.next = s
33         self.tail = s
34 
35     def extend(self, iterable):
36         for obj in iterable:
37             self.append(obj)
38         self.head.item += len(iterable)
39 
40     def __iter__(self):
41         return self.LinkListIterator(self.head.next)
42 
43     def __len__(self):
44         return self.head.item
45 
46     def __str__(self):
47         return "<<" + ", ".join(map(str, self)) + ">>"
48 
49 
50 li = [i for i in range(100)]
51 lk = LinkList(li)
52 print(lk)
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十一、观察者模式(发布订阅)

 1 # coding : utf-8
 2 # create by ztypl on 2017/5/27
 3 
 4 from abc import ABCMeta, abstractmethod
 5 
 6 class Observer(metaclass=ABCMeta):
 7     @abstractmethod
 8     def update(self, notice):
 9         pass
10 
11 
12 class Notice:
13     def __init__(self):
14         self.observers = []
15 
16     def attach(self, obs):
17         self.observers.append(obs)
18 
19     def detach(self, obs):
20         self.observers.remove(obs)
21         obs.company_info=None
22 
23     def notify(self):
24         for obj in self.observers:
25             print("---", type(self))
26             obj.update(self)  #这个self是ManagerNotice对象
27 
28 class ManagerNotice(Notice):
29     def __init__(self, company_info=None):
30         super().__init__()
31         self.__company_info = company_info
32 
33     @property
34     def company_info(self):
35         return self.__company_info
36 
37     @company_info.setter
38     def company_info(self, info):
39         self.__company_info = info
40         self.notify()
41 
42 
43 class Manager(Observer):
44     def __init__(self):
45         self.company_info = None
46 
47     def update(self, noti):
48         self.company_info = noti.company_info  # 拿到最新消息保存到对象中(alex,wusir)
49 
50 
51 notice = ManagerNotice()
52 
53 alex = Manager()
54 wusir = Manager()
55 
56 # print(alex.company_info)
57 # print(wusir.company_info)
58 
59 notice.attach(alex)
60 notice.attach(wusir)
61 #
62 notice.company_info="公司运行良好"
63 #
64 print(alex.company_info)
65 print(wusir.company_info)
66 
67 notice.company_info="公司将要上市"
68 #
69 print(alex.company_info)
70 print(wusir.company_info)
71 # #
72 notice.detach(wusir)
73 # # #
74 notice.company_info="公司要破产了，赶快跑路"
75 # #
76 print(alex.company_info)
77 print(wusir.company_info)
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十二、策略模式

 1 # coding : utf-8
 2 # create by ztypl on 2017/5/27
 3 
 4 from abc import ABCMeta, abstractmethod
 5 import random
 6 
 7 class Sort(metaclass=ABCMeta):
 8     @abstractmethod
 9     def sort(self, data):
10         pass
11 
12 
13 class QuickSort(Sort):
14     def quick_sort(self, data, left, right):
15         if left < right:
16             mid = self.partition(data, left, right)
17             self.quick_sort(data, left, mid - 1)
18             self.quick_sort(data, mid + 1, right)
19 
20     def partition(self, data, left, right):
21         tmp = data[left]
22         while left < right:
23             while left < right and data[right] >= tmp:
24                 right -= 1
25             data[left] = data[right]
26             while left < right and data[left] <= tmp:
27                 left += 1
28             data[right] = data[left]
29         data[left] = tmp
30         return left
31 
32     def sort(self, data):
33         print("快速排序")
34         return self.quick_sort(data, 0, len(data) - 1)
35 
36 
37 class MergeSort(Sort):
38     def merge(self, data, low, mid, high):
39         i = low
40         j = mid + 1
41         ltmp = []
42         while i <= mid and j <= high:
43             if data[i] <= data[j]:
44                 ltmp.append(data[i])
45                 i += 1
46             else:
47                 ltmp.append(data[j])
48                 j += 1
49 
50         while i <= mid:
51             ltmp.append(data[i])
52             i += 1
53 
54         while j <= high:
55             ltmp.append(data[j])
56             j += 1
57 
58         data[low:high + 1] = ltmp
59 
60 
61     def merge_sort(self, data, low, high):
62         if low < high:
63             mid = (low + high) // 2
64             self.merge_sort(data, low, mid)
65             self.merge_sort(data, mid + 1, high)
66             self.merge(data, low, mid, high)
67 
68     def sort(self, data):
69         print("归并排序")
70         return self.merge_sort(data, 0, len(data) - 1)
71 
72 
73 class Context:
74     def __init__(self, data, strategy=None):
75         self.data = data
76         self.strategy = strategy
77 
78     def set_strategy(self, strategy):
79         self.strategy = strategy
80 
81     def do_strategy(self):
82         if self.strategy:
83             self.strategy.sort(self.data)
84         else:
85             raise TypeError
86 
87 
88 li = list(range(100000))
89 random.shuffle(li)
90 
91 
92 context = Context(li, MergeSort())
93 context.do_strategy()
94 #print(context.data)
95 
96 random.shuffle(context.data)
97 
98 context.set_strategy(QuickSort())
99 context.do_strategy()
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十三、模板方法模式

 1 # coding : utf-8
 2 # create by ztypl on 2017/5/27
 3 
 4 from abc import ABCMeta, abstractmethod
 5 
 6 
 7 class IOHandler(metaclass=ABCMeta):
 8     @abstractmethod
 9     def open(self, name):
10         pass
11     @abstractmethod
12     def deal(self, change):
13         pass
14     @abstractmethod
15     def close(self):
16         pass
17     def process(self, name, change):
18         self.open(name)
19         self.deal(change)
20         self.close()
21 
22 class FileHandler(IOHandler):
23     def open(self, name):
24         self.file = open(name,"w")
25 
26     def deal(self, change):
27         self.file.write(change)
28 
29     def close(self):
30         self.file.close()
31 
32 
33 f = FileHandler()
34 f.process("abc.txt", "Hello World")
View Code

 

posted @ 2017-09-19 18:29  willianflasky  阅读(134)  评论(0)  编辑  收藏  举报