6-7【任務(wù)6-7】完整定義與使用1個父類Commodity和2個子類（Handset）

【任務(wù)6-7】完整定義與使用1個父類Commodity和2個子類（Book、Handset）【任務(wù)描述】（1）在項目Unit06創(chuàng)建Python程序文件6-7.py。（2）在程序文件6-7.py中完整定義與使用1個父類Commodity和2個子類（Book、Handset）。（3）綜合應(yīng)用類的屬性與方法計算與輸出應(yīng)付金額、返現(xiàn)金額、優(yōu)惠金額、運費和實付金額?！救蝿?wù)實施】在PyCharm項目Unit06中創(chuàng)建Python程序文件6-7.py。在程序文件6-7.py中編寫程序代碼，實現(xiàn)所需功能。編寫定義父類Commodity及其多個屬性、方法的代碼?！救蝿?wù)實施】classCommodity:#定義父類的構(gòu)造方法

def__init__(self,code="",name="",price=0.0,quantity=0):modityCode=codemodityName=namemodityPrice=pricemodityQuantity=quantity【任務(wù)實施】

#定義父類的實例屬性

@propertydefcode(self):returnself._code@code.setterdefcode(self,value):self._code=value【任務(wù)實施】

@propertydefname(self):returnself._name@name.setterdefname(self,value):self._name=value【任務(wù)實施】

@propertydefprice(self):returnself._price@price.setterdefprice(self,value):self._price=value【任務(wù)實施】

@propertydefquantity(self):returnself._quantity@quantity.setterdefquantity(self,value):ifnotisinstance(value,int):raiseValueError('購買數(shù)量應(yīng)為正整數(shù)!')self._quantity=value【任務(wù)實施】

@propertydefcalculateAmount(self):amount=modityPrice*modityNumberreturnamount@propertydefamount(self):amount=self.price*self.numberreturnamount【任務(wù)實施】defprintInfo(self,strInfo):print("{:^50s}".format(strInfo))defprintField(self,endMark="\n"):print("{:^9s}".format("商品編號"),end="")print("{:^20s}".format("商品名稱"),end="")print("{:^12s}".format("價格"),end=endMark)【任務(wù)實施】defprintData(self,endMark="\n"):print("{:^10s}".format(self.code),end="")print("{:^21s}".format(),end="")print("{:^8.2f}".format(self.price),end=endMark)【任務(wù)實施】編寫定義子類Book及其多個屬性、方法的代碼。#定義第1個子類BookclassBook(Commodity):def__init__(self,code="",name="",price=0.0,publisher="",editionOrder=1):Commodity.__init__(self,code,name,price)self.bookPublisher=publisherself.bookEdition=editionOrder【任務(wù)實施】

#定義子類Book的屬性

@propertydefpublisher(self):returnself._publisher@publisher.setterdefpublisher(self,value):self._publisher=value【任務(wù)實施】

@propertydefedition(self):returnself._edition@edition.setterdefedition(self,value):self._edition=value【任務(wù)實施】defprintField(self):Commodity.printField(self,"")print("{:^7s}".format("出版社名稱"),end="")print("{:^16s}".format("版次"))defprintData(self):Commodity.printData(self,"")print("{:^10s}".format(self.publisher),end="")print("{:^6d}".format(self.edition))【任務(wù)實施】

@classmethoddefgetDiscountPrice(cls,rank,price):ifrank=="PLUS":discountPrice=price*0.88else:ifrank=="FAN":discountPrice=price*0.90else:discountPrice=price*0.92returndiscountPrice【任務(wù)實施】@classmethoddefgetDiscount(cls,number,price):originalTotal=number*pricediscount=0iforiginalTotal>=299:discount=15.00returndiscount【任務(wù)實施】@classmethoddefgetCashback(cls,number,price):originalTotal=number*pricereduction=int(originalTotal/100)ifreduction>0:cashback=reduction*50returncashback【任務(wù)實施】@classmethoddefgetCarriage(cls,payable):#訂單金額＜49，收取基礎(chǔ)運費6元；訂單金額≥49，收取基礎(chǔ)運費0元

ifpayable<49:carriage=6.00else:carriage=0.00returncarriage【任務(wù)實施】

#輸出結(jié)算數(shù)據(jù)

@classmethoddefprintSettlementData(cls,*data):print("應(yīng)付金額：￥"+"{:.2f}".format(data[0]))print("運費：￥"+"{:.2f}".format(data[1]))print("返現(xiàn)金額：-￥"+"{:.2f}".format(data[2]))print("優(yōu)惠金額：-￥"+"{:.2f}".format(data[3]))print("實付金額：￥"+"{:.2f}".format(data[4]))【任務(wù)實施】編寫子類Handset及其多個屬性、方法的代碼。#定義第2個子類HandsetclassHandset(Commodity):def__init__(self,code="",name="",price=0.0,resolution="",screenSize=""):#在子類中使用supper()函數(shù)調(diào)用父類的__init__()方法super().__init__(self,code,name,price)self.handsetResolution=resolutionself.handsetScreenSize=screenSize【任務(wù)實施】

#定義子類Handset的屬性

@propertydefresolution(self):returnself._resolution@resolution.setterdefresolution(self,value):self._resolution=value【任務(wù)實施】

@propertydefscreenSize(self):returnself._screenSize@screenSize.setterdefscreenSize(self,value):self._screenSize=value【任務(wù)實施】

defprintField(self):Commodity.printField(self,"")print("{:^6s}".format("屏幕尺寸"),end="")print("{:^16s}".format("物理分辨率"))【任務(wù)實施】defprintData(self):Commodity.printData(self,"")print("{:^20s}".format(self.screenSize),end="")print("{:^12s}".format(self.resolution))【任務(wù)實施】針對創(chuàng)建的類Commodity和兩個子類Book、Handset實施以下各項操作。1．創(chuàng)建子類Book的實例對象book代碼如下：book=Book()【任務(wù)實施】2．通過類的實例對象book給類的屬性賦值代碼如下：book.code="12563157"="給Python點顏色青少年學編程"book.price=59.80book.quantity=1book.publisher="人民郵電出版社"book.edition=1【任務(wù)實施】3．通過類的實例對象book以模擬表格方式輸出圖書數(shù)據(jù)代碼如下：book.printField()book.printData()運行結(jié)果為：商品編號商品名稱價格出版社名稱版次12563157給Python點顏色青少年學編程59.80人民郵電出版社1【任務(wù)實施】4．通過類的實例對象book分別設(shè)置父類實例屬性的值和用戶等級代碼如下：book.quantity=5rank="Ordinaryusers"【任務(wù)實施】5．調(diào)用類的多個方法分別計算應(yīng)付金額、返現(xiàn)金額、優(yōu)惠金額、運費和實付金額代碼如下：discountPrice=book.getDiscountPrice(rank,book.price)discountAmount=book.quantity*discountPricediscount=book.getDiscount(book.quantity,book.price)cashback=book.getCashback(book.quantity,book.price)discountTotal=discount+cashbackpayable=discountAmount-discountTotalcarriage=book.getCarriage(payable)payable+=carriage【任務(wù)實施】6．調(diào)用子類book的方法printSettl