写一个基于Python的简易股票交易模拟系统

一个简单的Python股票交易模拟系统可以包括以下几个关键部分：

1. **股票类** (Stock): 创建一个表示股票的对象，包含属性如名称、当前价格、购买价格等，并提供买入(Buy)和卖出(Sell)方法。

class Stock:
    def __init__(self, name, price):
        self.name = name
        self.price = price
        self.purchase_price = None

    def buy(self, quantity, current_price):
        if not self.purchase_price:
            self.purchase_price = current_price
        else:
            print(f"Not enough funds for {quantity} shares of {self.name}")
        # 更新购买记录

    def sell(self, quantity, current_price):
        if self.purchase_price and self.balance >= quantity * current_price:
            profit = (current_price - self.purchase_price) * quantity
            self.purchase_price = None
            print(f"Sold {quantity} shares of {self.name}, profit: {profit}")
        else:
            print("Insufficient holdings or insufficient balance")

    @property
    def balance(self):
        return self.price * (self.purchase_price or 0)

2. **账户类** (Account): 管理用户的投资组合，存储股票对象和可用资金。

class Account:
    def __init__(self, initial_funds):
        self.funds = initial_funds
        self.portfolio = {}

    def add_stock(self, stock, quantity):
        self.portfolio[stock] = quantity

    def trade(self, stock_name, action, quantity, current_price):
        if stock_name in self.portfolio:
            stock = self.portfolio[stock_name]
            stock[action](quantity, current_price)
        else:
            print(f"No {stock_name} in portfolio.")

3. **主程序** (Main):

def main():
    stock = Stock('AAPL', 150)
    account = Account(10000)

    account.add_stock(stock, 100)
    account.trade('AAPL', 'buy', 50, stock.price)
    # 更改实时股价并进行买卖操作...
    
if __name__ == "__main__":
    main()