Python代码  

1. class Operation:
2. def GetResult(self):
3. pass
4. class OperationAdd(Operation):
5. def GetResult(self):
6. return self.op1 + self.op2
7. class OperationSub(Operation):
8. def GetResult(self):
9. return self.op1 - self.op2
10. class OperationMul(Operation):
11. def GetResult(self):
12. return self.op1 * self.op2
13. class OperationDiv(Operation):
14. def GetResult(self):
15. try:
16. result = self.op1 / self.op2
17. return result
18. except:
19. print "error:divided by zero."
20. return 0
21. class OperationUndef(Operation):
22. def GetResult(self):
23. print "Undefine operation."
24. return 0
25. class OperationFactory:
26. operation = {}
27. operation["+"] = OperationAdd();
28. operation["-"] = OperationSub();
29. operation["*"] = OperationMul();
30. operation["/"] = OperationDiv();
31. def createOperation(self, ch):
32. if ch in self.operation:
33. op = self.operation[ch]
34. else:
35. op = OperationUndef()
36. return op
37. if __name__ == "__main__":
38. op = raw_input("operator: ")
39. opa = input("a: ")
40. opb = input("b: ")
41. factory = OperationFactory()
42. cal = factory.createOperation(op)
43. cal.op1 = opa
44. cal.op2 = opb
45. print cal.GetResult()

Python代码  

1. class CashSuper:
2. def AcceptCash(self, money):
3. return 0
4. class CashNormal(CashSuper):
5. def AcceptCash(self, money):
6. return money
7. class CashRebate(CashSuper):
8. discount = 0
9. def __init__(self, ds):
10. self.discount = ds
11. def AcceptCash(self, money):
12. return money * self.discount
13. class CashReturn(CashSuper):
14. total = 0;
15. ret = 0;
16. def __init__(self, t, r):
17. self.total = t
18. self.ret = r
19. def AcceptCash(self, money):
20. if (money >= self.total):
21. return money - self.ret
22. else:
23. return money
24. class CashContext:
25. def __init__(self, csuper):
26. self.cs = csuper
27. def GetResult(self, money):
28. return self.cs.AcceptCash(money)
29. if __name__ == "__main__":
30. money = input("money:")
31. strategy = {}
32. strategy[1] = CashContext(CashNormal())
33. strategy[2] = CashContext(CashRebate(0.8))
34. strategy[3] = CashContext(CashReturn(300, 100))
35. ctype = input("type:[1]for normal,[2]for 80% discount [3]for 300 -100.")
36. if ctype in strategy:
37. cc = strategy[ctype]
38. else:
39. print "Undefine type.Use normal mode."
40. cc = strategy[1]
41. print "you will pay:%d" % (cc.GetResult(money))

1. class Person:
2. def __init__(self, tname):
3. self.name = tname
4. def Show(self):
5. print "dressed %s" % (self.name)
6. class Finery(Person):
7. componet = None
8. def __init__(self):
9. pass
10. def Decorate(self, ct):
11. self.componet = ct
12. def Show(self):
13. if (self.componet != None):
14. self.componet.Show()
15. class TShirts(Finery):
16. def __init__(self):
17. pass
18. def Show(self):
19. print "Big T-shirt "
20. self.componet.Show()
21. class BigTrouser(Finery):
22. def __init__(self):
23. pass
24. def Show(self):
25. print "Big Trouser "
26. self.componet.Show()
27. if __name__ == "__main__":
28. p = Person("somebody")
29. bt = BigTrouser()
30. ts = TShirts()
31. bt.Decorate(p)
32. ts.Decorate(bt)
33. ts.Show()

1. class Interface :
2. def Request(self):
3. return 0
4. class RealSubject(Interface):
5. def Request(self):
6. print "Real request."
7. class Proxy(Interface):
8. def Request(self):
9. self.real = RealSubject()
10. self.real.Request()
11. if __name__ == "__main__":
12. p = Proxy()
13. p.Request()

1. class LeiFeng:
2. def Sweep(self):
3. print "LeiFeng sweep"
4. class Student(LeiFeng):
5. def Sweep(self):
6. print "Student sweep"
7. class Volenter(LeiFeng):
8. def Sweep(self):
9. print "Volenter sweep"
10. class LeiFengFactory:
11. def CreateLeiFeng(self):
12. temp = LeiFeng()
13. return temp
14. class StudentFactory(LeiFengFactory):
15. def CreateLeiFeng(self):
16. temp = Student()
17. return temp
18. class VolenterFactory(LeiFengFactory):
19. def CreateLeiFeng(self):
20. temp = Volenter()
21. return temp
22. if __name__ == "__main__":
23. sf = StudentFactory()
24. s = sf.CreateLeiFeng()
25. s.Sweep()
26. sdf = VolenterFactory()
27. sd = sdf.CreateLeiFeng()
28. sd.Sweep()

class WorkExp:place=""year=0class Resume:name = ''age = 0def __init__(self,n):self.name = ndef SetAge(self,a):self.age = adef SetWorkExp(self,p,y):self.place = pself.year = ydef Display(self):print self.ageprint self.placeprint self.yeardef Clone(self):#实际不是“克隆”，只是返回了自身return selfif __name__ == "__main__":a = Resume("a")b = a.Clone()c = copy.copy(a)d = copy.deepcopy(a)a.SetAge(7)b.SetAge(12)c.SetAge(15)d.SetAge(18)a.SetWorkExp("PrimarySchool",1996)b.SetWorkExp("MidSchool",2001)c.SetWorkExp("HighSchool",2004)d.SetWorkExp("University",2007)a.Display()b.Display()c.Display()d.Display()

1. class Paper:
2. def Question1(self):
3. print "1:A. B. C. D."
4. print "(%s)" % self.Answer1()
5. def Question2(self):
6. print "1:A. B. C. D."
7. print "(%s)" % self.Answer2()
8. def Answer1(self):
9. return ""
10. def Answer2(self):
11. return ""
12. class PaperA(Paper):
13. def Answer1(self):
14. return "B"
15. def Answer2(self):
16. return "C";
17. class PaperB(Paper):
18. def Answer1(self):
19. return "D"
20. def Answer2(self):
21. return "D";
22. if __name__ == "__main__":
23. s1 = PaperA()
24. s2 = PaperB()
25. print "student 1"
26. s1.Question1()
27. s1.Question2()
28. print "student 2"
29. s2.Question1()
30. s2.Question2()

class SubSystemOne:def MethodOne(self):print "SubSysOne"class SubSystemTwo:def MethodTwo(self):print "SubSysTwo"class SubSystemThree:def MethodThree(self):print "SubSysThree"class SubSystemFour:def MethodFour(self):print "SubSysFour"class Facade:def __init__(self):self.one = SubSystemOne()self.two = SubSystemTwo()self.three = SubSystemThree()self.four = SubSystemFour()def MethodA(self):print "MethodA"self.one.MethodOne()self.two.MethodTwo()self.four.MethodFour()def MethodB(self):print "MethodB"self.two.MethodTwo()self.three.MethodThree()if __name__ == "__main__":facade = Facade()facade.MethodA()facade.MethodB()

1. class Person:
2. def CreateHead(self):
3. pass
4. def CreateHand(self):
5. pass
6. def CreateBody(self):
7. pass
8. def CreateFoot(self):
9. pass
10. class ThinPerson(Person):
11. def CreateHead(self):
12. print "thin head"
13. def CreateHand(self):
14. print "thin hand"
15. def CreateBody(self):
16. print "thin body"
17. def CreateFoot(self):
18. print "thin foot"
19. class ThickPerson(Person):
20. def CreateHead(self):
21. print "thick head"
22. def CreateHand(self):
23. print "thick hand"
24. def CreateBody(self):
25. print "thick body"
26. def CreateFoot(self):
27. print "thick foot"
28. class Director:
29. def __init__(self, temp):
30. self.p = temp
31. def Create(self):
32. self.p.CreateHead()
33. self.p.CreateBody()
34. self.p.CreateHand()
35. self.p.CreateFoot()
36. if __name__ == "__main__":
37. p = ThickPerson()
38. d = Director(p)
39. d.Create()

1. class Observer:
2. def __init__(self, strname, strsub):
3. self.name = strname
4. self.sub = strsub
5. def Update(self):
6. pass
7. class StockObserver(Observer):
8. #no need to rewrite __init__()
9. def Update(self):
10. print "%s:%s,stop watching Stock and go on work!" % (self.name, self.sub.action)
11. class NBAObserver(Observer):
12. def Update(self):
13. print "%s:%s,stop watching NBA and go on work!" % (self.name, self.sub.action)
14. class SecretaryBase:
15. def __init__(self):
16. self.observers = []
17. def Attach(self, new_observer):
18. pass
19. def Notify(self):
20. pass
21. class Secretary(SecretaryBase):
22. def Attach(self, new_observer):
23. self.observers.append(new_observer)
24. def Notify(self):
25. for p in self.observers:
26. p.Update()
27. if __name__ == "__main__":
28. p = Secretary()
29. s1 = StockObserver("xh", p)
30. s2 = NBAObserver("wyt", p)
31. p.Attach(s1);
32. p.Attach(s2);
33. p.action = "WARNING:BOSS ";
34. p.Notify()

1. class IUser:
2. def GetUser(self):
3. pass
4. def InsertUser(self):
5. pass
6. class IDepartment:
7. def GetDepartment(self):
8. pass
9. def InsertDepartment(self):
10. pass
11. class CAccessUser(IUser):
12. def GetUser(self):
13. print "Access GetUser"
14. def InsertUser(self):
15. print "Access InsertUser"
16. class CAccessDepartment(IDepartment):
17. def GetDepartment(self):
18. print "Access GetDepartment"
19. def InsertDepartment(self):
20. print "Access InsertDepartment"
21. class CSqlUser(IUser):
22. def GetUser(self):
23. print "Sql GetUser"
24. def InsertUser(self):
25. print "Sql InsertUser"
26. class CSqlDepartment(IDepartment):
27. def GetDepartment(self):
28. print "Sql GetDepartment"
29. def InsertDepartment(self):
30. print "Sql InsertDepartment"
31. class IFactory:
32. def CreateUser(self):
33. pass
34. def CreateDepartment(self):
35. pass
36. class AccessFactory(IFactory):
37. def CreateUser(self):
38. temp = CAccessUser()
39. return temp
40. def CreateDepartment(self):
41. temp = CAccessDepartment()
42. return temp
43. class SqlFactory(IFactory):
44. def CreateUser(self):
45. temp = CSqlUser()
46. return temp
47. def CreateDepartment(self):
48. temp = CSqlDepartment()
49. return temp
50. if __name__ == "__main__":
51. factory = SqlFactory()
52. user = factory.CreateUser()
53. depart = factory.CreateDepartment()
54. user.GetUser()
55. depart.GetDepartment()

1. class State:
2. def WirteProgram(self):
3. pass
4. class Work:
5. def __init__(self):
6. self.hour = 9
7. self.current = ForenoonState()
8. def SetState(self, temp):
9. self.current = temp
10. def WriteProgram(self):
11. self.current.WriteProgram(self)
12. class NoonState(State):
13. def WriteProgram(self, w):
14. print "noon working"
15. if (w.hour < 13):
16. print "fun."
17. else:
18. print "need to rest."
19. class ForenoonState(State):
20. def WriteProgram(self, w):
21. if (w.hour < 12):
22. print "morning working"
23. print "energetic"
24. else:
25. w.SetState(NoonState())
26. w.WriteProgram()
27. if __name__ == "__main__":
28. mywork = Work()
29. mywork.hour = 9
30. mywork.WriteProgram()
31. mywork.hour = 14
32. mywork.WriteProgram()

class Target:def Request():print "common request."class Adaptee(Target):def SpecificRequest(self):print "specific request."class Adapter(Target):def __init__(self,ada):self.adaptee = adadef Request(self):self.adaptee.SpecificRequest()if __name__ == "__main__":adaptee = Adaptee()adapter = Adapter(adaptee)adapter.Request()

class Originator:def __init__(self):self.state = ""def Show(self):print self.statedef CreateMemo(self):return Memo(self.state)def SetMemo(self,memo):self.state = memo.stateclass Memo:state= ""def __init__(self,ts):self.state = tsclass Caretaker:memo = ""if __name__ == "__main__":on = Originator()on.state = "on"on.Show()c = Caretaker()c.memo=on.CreateMemo()on.state="off"on.Show()on.SetMemo(c.memo)on.Show()

class Component:def __init__(self,strName):self.m_strName = strNamedef Add(self,com):passdef Display(self,nDepth):passclass Leaf(Component):def Add(self,com):print "leaf can't add"def Display(self,nDepth):strtemp = ""for i in range(nDepth):strtemp=strtemp+"-"strtemp=strtemp+self.m_strNameprint strtempclass Composite(Component):def __init__(self,strName):self.m_strName = strNameself.c = []def Add(self,com):self.c.append(com)def Display(self,nDepth):strtemp=""for i in range(nDepth):strtemp=strtemp+"-"strtemp=strtemp+self.m_strNameprint strtempfor com in self.c:com.Display(nDepth+2)if __name__ == "__main__":p = Composite("Wong")p.Add(Leaf("Lee"))p.Add(Leaf("Zhao"))p1 = Composite("Wu")p1.Add(Leaf("San"))p.Add(p1)p.Display(1);

#-*- encoding=utf-8 -*-
print '----------------------方法1--------------------------'
#方法1,实现__new__方法
#并在将一个类的实例绑定到类变量_instance上,
#如果cls._instance为None说明该类还没有实例化过,实例化该类,并返回
#如果cls._instance不为None,直接返回cls._instance
class Singleton(object):def __new__(cls, *args, **kw):if not hasattr(cls, '_instance'):orig = super(Singleton, cls)cls._instance = orig.__new__(cls, *args, **kw)return cls._instanceclass MyClass(Singleton):a = 1one = MyClass()
two = MyClass()two.a = 3
print one.a
#3
#one和two完全相同,可以用id(), ==, is检测
print id(one)
#29097904
print id(two)
#29097904
print one == two
#True
print one is two
#Trueprint '----------------------方法2--------------------------'
#方法2,共享属性;所谓单例就是所有引用(实例、对象)拥有相同的状态(属性)和行为(方法)
#同一个类的所有实例天然拥有相同的行为(方法),
#只需要保证同一个类的所有实例具有相同的状态(属性)即可
#所有实例共享属性的最简单最直接的方法就是__dict__属性指向(引用)同一个字典(dict)
#可参看:http://code.activestate.com/recipes/66531/
class Borg(object):_state = {}def __new__(cls, *args, **kw):ob = super(Borg, cls).__new__(cls, *args, **kw)ob.__dict__ = cls._statereturn obclass MyClass2(Borg):a = 1one = MyClass2()
two = MyClass2()#one和two是两个不同的对象,id, ==, is对比结果可看出
two.a = 3
print one.a
#3
print id(one)
#28873680
print id(two)
#28873712
print one == two
#False
print one is two
#False
#但是one和two具有相同的（同一个__dict__属性）,见:
print id(one.__dict__)
#30104000
print id(two.__dict__)
#30104000print '----------------------方法3--------------------------'
#方法3:本质上是方法1的升级（或者说高级）版
#使用__metaclass__（元类）的高级python用法
class Singleton2(type):def __init__(cls, name, bases, dict):super(Singleton2, cls).__init__(name, bases, dict)cls._instance = Nonedef __call__(cls, *args, **kw):if cls._instance is None:cls._instance = super(Singleton2, cls).__call__(*args, **kw)return cls._instanceclass MyClass3(object):__metaclass__ = Singleton2one = MyClass3()
two = MyClass3()two.a = 3
print one.a
#3
print id(one)
#31495472
print id(two)
#31495472
print one == two
#True
print one is two
#Trueprint '----------------------方法4--------------------------'
#方法4:也是方法1的升级（高级）版本,
#使用装饰器(decorator),
#这是一种更pythonic,更elegant的方法,
#单例类本身根本不知道自己是单例的,因为他本身(自己的代码)并不是单例的
def singleton(cls, *args, **kw):instances = {}def _singleton():if cls not in instances:instances[cls] = cls(*args, **kw)return instances[cls]return _singleton@singleton
class MyClass4(object):a = 1def __init__(self, x=0):self.x = xone = MyClass4()
two = MyClass4()two.a = 3
print one.a
#3
print id(one)
#29660784
print id(two)
#29660784
print one == two
#True
print one is two
#True
one.x = 1
print one.x
#1
print two.x

class HandsetSoft(object):def Run(self):passclass HandsetGame(HandsetSoft):def Run(self):print "Game"class HandsetAddressList(HandsetSoft):def Run(self):print "Address List"class HandsetBrand(object):def __init__(self):self.m_soft = Nonedef SetHandsetSoft(self,temp):self.m_soft= tempdef Run(self):passclass HandsetBrandM(HandsetBrand):def Run(self):if not (self.m_soft == None):print "BrandM"self.m_soft.Run()class HandsetBrandN(HandsetBrand):def Run(self):if not (self.m_soft == None):print "BrandN"self.m_soft.Run()if __name__ == "__main__":brand = HandsetBrandM()brand.SetHandsetSoft(HandsetGame())brand.Run()brand.SetHandsetSoft(HandsetAddressList())brand.Run() 

class Barbucer:def MakeMutton(self):print "Mutton"def MakeChickenWing(self):print "Chicken Wing"class Command:def __init__(self,temp):self.receiver=tempdef ExecuteCmd(self):passclass BakeMuttonCmd(Command):def ExecuteCmd(self):self.receiver.MakeMutton()class ChickenWingCmd(Command):def ExecuteCmd(self):self.receiver.MakeChickenWing()class Waiter:def __init__(self):self.order =[]def SetCmd(self,command):self.order.append(command)print "Add Order"def Notify(self):for cmd in self.order:#self.order.remove(cmd)#lead to a bugcmd.ExecuteCmd()if __name__ == "__main__":barbucer=Barbucer()cmd=BakeMuttonCmd(barbucer)cmd2=ChickenWingCmd(barbucer)girl=Waiter()girl.SetCmd(cmd)girl.SetCmd(cmd2)girl.Notify()

c=[0,1,2,3]
for i in c:print ic.remove(i)#output:
#0
#2

1. class Request:
2. def __init__(self, tcontent, tnum):
3. self.content = tcontent
4. self.num = tnum
5. class Manager:
6. def __init__(self, temp):
7. self.name = temp
8. def SetSuccessor(self, temp):
9. self.manager = temp
10. def GetRequest(self, req):
11. pass
12. class CommonManager(Manager):
13. def GetRequest(self, req):
14. if (req.num >= 0 and req.num < 10):
15. print "%s handled %d request." % (self.name, req.num)
16. else:
17. self.manager.GetRequest(req)
18. class MajorDomo(Manager):
19. def GetRequest(self, req):
20. if (req.num >= 10):
21. print "%s handled %d request." % (self.name, req.num)
22. if __name__ == "__main__":
23. common = CommonManager("Zhang")
24. major = MajorDomo("Lee")
25. common.SetSuccessor(major)
26. req = Request("rest", 33)
27. common.GetRequest(req)
28. req2 = Request("salary", 3)
29. common.GetRequest(req2)

class Mediator:def Send(self,message,col):passclass Colleague:def __init__(self,temp):self.mediator = tempclass Colleague1(Colleague):def Send(self,message):self.mediator.Send(message,self)def Notify(self,message):print "Colleague1 get a message:%s" %messageclass Colleague2(Colleague):def Send(self,message):self.mediator.Send(message,self)def Notify(self,message):print "Colleague2 get a message:%s" %messageclass ConcreteMediator(Mediator):def Send(self,message,col):if(col==col1):col2.Notify(message)else:col1.Notify(message)if __name__ == "__main__":m =ConcreteMediator()col1 = Colleague1(m)col2 = Colleague1(m)m.col1=col1m.col2=col2col1.Send("How are you?");col2.Send("Fine.");

import sysclass WebSite:def Use(self):passclass ConcreteWebSite(WebSite):def __init__(self,strName):self.name = strNamedef Use(self,user):print "Website type:%s,user:%s" %(self.name,user)class UnShareWebSite(WebSite):def __init__(self,strName):self.name = strNamedef Use(self,user):print "UnShare Website type:%s,user:%s" %(self.name, user)class WebFactory:def __init__(self):test = ConcreteWebSite("test")self.webtype ={"test":test}self.count = {"test":0}def GetWeb(self,webtype):if webtype not in self.webtype:temp = ConcreteWebSite(webtype)self.webtype[webtype] = tempself.count[webtype] =1else:temp = self.webtype[webtype]self.count[webtype] = self.count[webtype]+1return tempdef GetCount(self):for key in self.webtype:#print "type: %s, count:%d" %(key,sys.getrefcount(self.webtype[key]))print "type: %s, count:%d " %(key,self.count[key])if __name__ == "__main__":f = WebFactory()ws=f.GetWeb("blog")ws.Use("Lee")ws2=f.GetWeb("show")ws2.Use("Jack")ws3=f.GetWeb("blog")ws3.Use("Chen")ws4=UnShareWebSite("TEST")ws4.Use("Mr.Q")print f.webtypef.GetCount()

class Context:def __init__(self):self.input=""self.output=""class AbstractExpression:def Interpret(self,context):passclass Expression(AbstractExpression):def Interpret(self,context):print "terminal interpret"class NonterminalExpression(AbstractExpression):def Interpret(self,context):print "Nonterminal interpret"if __name__ == "__main__":context= ""c = []c = c + [Expression()]c = c + [NonterminalExpression()]c = c + [Expression()]c = c + [Expression()]for a in c:a.Interpret(context)

# -*- coding: UTF-8 -*-
class Person:def Accept(self,visitor):passclass Man(Person):def Accept(self,visitor):visitor.GetManConclusion(self)class Woman(Person):def Accept(self,visitor):visitor.GetWomanConclusion(self)class Action:def GetManConclusion(self,concreteElementA):passdef GetWomanConclusion(self,concreteElementB):passclass Success(Action):def GetManConclusion(self,concreteElementA):print "男人成功时，背后有个伟大的女人"def GetWomanConclusion(self,concreteElementB):print "女人成功时，背后有个不成功的男人"class Failure(Action):def GetManConclusion(self,concreteElementA):print "男人失败时，闷头喝酒，谁也不用劝"def GetWomanConclusion(self,concreteElementB):print "女人失败时，眼泪汪汪，谁也劝不了"class ObjectStructure:def __init__(self):self.plist=[]def Add(self,p):self.plist=self.plist+[p]def Display(self,act):for p in self.plist:p.Accept(act)if __name__ == "__main__":os = ObjectStructure()os.Add(Man())os.Add(Woman())sc = Success()os.Display(sc)fl = Failure()os.Display(fl)