python 【问题描述】 设计一个名为Stock的类来表示一个公司的股票，包括以下内容： 1）股票代码、股票名称、前一天股票价格、当天股票价格4个私有属性； 2）构造方法，需初始化代码、名称、前一天价格和当天价格等属性； 3）返回股票名字的get方法; 4）返回股票代码的get方法; 5）获取和设置股票前一天价格的get和set方法; 6）获取和设置股票当前价格的get和set方法; 7）名为getChangePercent()方法，返回前日收市价至当前价格的变化百分比； 8). 包括文档字符串，其内容为:"Stock Information Class" 说明：各方法的名称及参数要求请参见测试程序。 【样例输入】 601318 Chinese PINAN 63.21 64.39 【样例输出】 Code:601318 Name:Chinese PINAN Price/Yesterday:63.21 Price/Today:64.39 Edit Price/Yesterday To:50.25 Price Change Percentage:28.14% Stock Information Class #class Stock sCode = input() #Stock Code sName = input() #Stock Name priceYesterday = float(input()) #Price/Yesterday priceToday = float(input()) #Price Today s = Stock(sCode,sName,priceYesterday,priceToday) print("Code:",s.getCode()) print("Name:",s.getName()) print("Price/Yesterday:%.2f\nPrice Today:%.2f" % (s.getPriceYesterday(),s.getPriceToday())) s.setPriceYesterday(50.25) print("Edit Price/Yesterday To:%.2f" % 50.25) print("Price Change Percentage:%.2f%%" % (s.getChangePercent()*100)) print(Stock.__doc__)

class Stock:
    """
    Stock Information Class
    
    Attributes:
        _code (str): Stock code
        _name (str): Stock name
        _price_yesterday (float): Yesterday's stock price
        _price_today (float): Today's stock price
    """
    def __init__(self, code, name, price_yesterday, price_today):
        self._code = code
        self._name = name
        self._price_yesterday = price_yesterday
        self._price_today = price_today
    
    def getCode(self):
        """
        Get stock code
        
        Returns:
            str: Stock code
        """
        return self._code
    
    def getName(self):
        """
        Get stock name
        
        Returns:
            str: Stock name
        """
        return self._name
    
    def getPriceYesterday(self):
        """
        Get yesterday's stock price
        
        Returns:
            float: Yesterday's stock price
        """
        return self._price_yesterday
    
    def setPriceYesterday(self, price):
        """
        Set yesterday's stock price
        
        Args:
            price (float): Yesterday's stock price
        """
        self._price_yesterday = price
    
    def getPriceToday(self):
        """
        Get today's stock price
        
        Returns:
            float: Today's stock price
        """
        return self._price_today
    
    def setPriceToday(self, price):
        """
        Set today's stock price
        
        Args:
            price (float): Today's stock price
        """
        self._price_today = price
    
    def getChangePercent(self):
        """
        Get the change percentage from yesterday's closing price to today's price
        
        Returns:
            float: The change percentage
        """
        return (self._price_today - self._price_yesterday) / self._price_yesterday
    
sCode = input()  # Stock Code
sName = input()  # Stock Name
priceYesterday = float(input())    # Price/Yesterday
priceToday = float(input())    # Price Today
s = Stock(sCode, sName, priceYesterday, priceToday)

print("Code:", s.getCode())
print("Name:", s.getName())
print("Price/Yesterday:%.2f\nPrice Today:%.2f" % (s.getPriceYesterday(), s.getPriceToday()))

s.setPriceYesterday(50.25)
print("Edit Price/Yesterday To:%.2f" % 50.25)
print("Price Change Percentage:%.2f%%" % (s.getChangePercent()*100))

print(Stock.__doc__)