python-面向对象（股票对象举例）

class Stock(object):
    def __init__(self,stockCode ,stockName,averagePrice_yesterday,averagePrice_today,position_old):
        self.stockCode=stockCode
        self.stockName=stockName
        self.averagePrice_yesterday=averagePrice_yesterday
        self.averagePrice_today=averagePrice_today
        self.position_old=position_old
        
    
    def displayStock(self):
        print (("股票名称:%s"+"  "+"股票代码：%s"+"  "+"昨日均价：%s"+"  "+"今日均价：%s"+"  "+"昨日仓位：%s")% (self.stockName,self.stockCode,self.averagePrice_yesterday,self.averagePrice_today,self.position_old))
    
    def profit(self):
        stock_profit=(self.averagePrice_today-self.averagePrice_yesterday)/self.averagePrice_yesterday
        return stock_profit

stock1=Stock("600036","招商银行",18.06,17.81,0.1)
stock2=Stock("002307","北新路桥",20.812,19.177,0.2)
stock1.displayStock()
stock2.displayStock()

股票名称:招商银行 股票代码：600036 昨日均价：18.06 今日均价：17.81 昨日仓位：0.1
股票名称:北新路桥 股票代码：002307 昨日均价：20.812 今日均价：19.177 昨日仓位：0.2

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