# -*- coding:utf-8 -*-#! python3class dvd:  def __init__(self,name,price,state):    self.name=name;    self.price=price    self.state=state  def __str__(self):    stat='已借出';    if self.state==1:      stat='未借出'    return '名稱：《%s》 單價:%d 狀態(tài):%s'%(self.name,self.price,stat)class DVDManager:  #存儲 多個dvds 每一個元素 都是一個DVD  dvds=[]  def init(self):    self.dvds.append(dvd('光輝歲月',10,0));    self.dvds.append(dvd('紳士', 5, 1));    self.dvds.append(dvd('海闊天空', 11, 1));  def Menu(self):    self.init()    while(True):      print('1.查詢所有DVD')      print('2.增加DVD')      print('3.借出DVD')      print('4.歸還DVD')      print('5.退出')      choose=int(input('請選擇：'));      if choose==1:        self.showAllDVD();      elif choose==2:        self.insertDVD();      elif choose==3:        self.jiechuDVD();      elif choose==4:        self.rollBackDVD();      elif choose==5:        print('5.謝謝使用')        break;  def showAllDVD(self):    for d in self.dvds:      print(str(d))  def jiechuDVD(self):    name = input('請輸入DVD的名稱：')    ret = self.checkDVD(name);    if ret != None:      if ret.state==0:        print('dvd 已經(jīng)借出去了')        #return;      else:        days=int(input('請輸入借出天數(shù)：'))        ret.state = 0;        print('借出 %d 天，應(yīng)還利息%d '%(days,ret.price*days))    else:      print('DVD 不存在！')  def rollBackDVD(self):    name = input('請輸入歸還DVD的名稱：')    ret = self.checkDVD(name);    if ret == None:      print('DVD 不存在！')    else:      if ret.state == 1:        print('dvd 未借出！')      else:        days= int(input('請輸入借出去了多少天？'))        y_money=ret.price * days        print('借出 %d 天，應(yīng)還利息%d ' % (days, y_money))        money=0;        while True:          money= int(input('請輸入金額:'))          #帶學(xué)生完成..          if money<y_money:            print('不夠！')          else:            break;        if money>=y_money:          print('找零：%d'%(money-y_money));        ret.state=1;        print('歸還成功！')  def insertDVD(self):    name = input('請輸入DVD的名稱：')    ret= self.checkDVD(name);    if ret != None:      print('DVD 已經(jīng)存在！')    else:      price=int(input('請輸入價格：'))      new_dvd=dvd(name,price,1);      self.dvds.append(new_dvd)      print('存放成功！')  def checkDVD(self,name):    for d in self.dvds:      if d.name==name:        return d;#返回當(dāng)前對象-->內(nèi)存地址    else:      return None;manager= DVDManager();manager.Menu();

# -*- coding:utf-8 -*-#! python3class pet:  def kanbing(self):    print('給寵物看病。。')class Car(pet):  def kanbing(self):    print('給貓咪看病 吃藥，吃小黃魚..')class Dog(pet):  def kanbing(self):    print('給狗狗看病 輸液 吃骨頭....')class bird(pet):  def kanbing(self):    print('看小鳥看病 拔罐 吃蟲子... ')class pig(pet):  def kanbing(self):    print('給小豬看病 針灸 吃豬糧... ')class ShouVet:  def JiuZhen(self,pet):    print('獸醫(yī)出診..給寵物看病...')    pet.kanbing();class person:  def kanbing(self):    print('給人類看病 望聞問切 多喝水..')dingdang=Car();kala=Dog();huangli=bird();peiqi=pig()bianque=person()syi=ShouVet();syi.JiuZhen(dingdang);syi.JiuZhen(kala);syi.JiuZhen(huangli);syi.JiuZhen(peiqi);syi.JiuZhen(bianque)

# -*- coding:utf-8 -*-#! python3class Operation(object):  '''  四則運算的父類,接收用戶輸入的數(shù)值  '''  def __init__(self, number1=0, number2=0):    self.num1 = number1    self.num2 = number2  def GetResult(self):    pass  pass#加法運算類class OperationAdd(Operation):  def GetResult(self):    return self.num1 + self.num2#減法運算類class OperationSub(Operation):  def GetResult(self):    return self.num1 - self.num2#乘法運算類class OperationMul(Operation):  def GetResult(self):    return self.num1 * self.num2#除法運算類class OperationDiv(Operation):  def GetResult(self):    if self.num2 == 0:      return '除數(shù)不能為0 '    return 1.0*self.num1 / self.num2#其他操作符類class OperationUndef(Operation):  def GetResult(self):    return '操作符錯誤'#簡單工廠類class OperationFactory(object):  def choose_oper(self,ch):    if ch == '+':      return OperationAdd()    elif ch == '-':      return OperationSub()    elif ch == '*':      return OperationMul()    elif ch == '/':      return OperationDiv()    else:      return OperationUndef()if __name__ == "__main__":  ch = ''  while not ch == 'q':    num1 = input('請輸入第一個數(shù)值: ')    oper = str(input('請輸入一個四則運算符: '))    num2 = input('請輸入第二個數(shù)值: ')    # Operation(num1,num2)    OF = OperationFactory()    oper_obj = OF.choose_oper(oper)    oper_obj.num1 = num1    oper_obj.num2 = num2    print('運算結(jié)果為: ',oper_obj.GetResult())