基于python的火车票订票系统的设计与实现的代码，不利用数据库

好的，下面是一个简单的基于 Python 的火车票订票系统的代码实现，不利用数据库：

import random

# 定义火车票类
class Ticket:
    def __init__(self, train_no, start_station, end_station, price, seat_num):
        self.train_no = train_no
        self.start_station = start_station
        self.end_station = end_station
        self.price = price
        self.seat_num = seat_num

# 定义火车票订票系统类
class TicketSystem:
    def __init__(self):
        self.tickets = []   # 存储所有火车票的列表

    # 添加一张新的火车票
    def add_ticket(self, train_no, start_station, end_station, price, seat_num):
        ticket = Ticket(train_no, start_station, end_station, price, seat_num)
        self.tickets.append(ticket)

    # 查询余票
    def query_tickets(self, start_station, end_station):
        available_tickets = []  # 存储符合条件的火车票的列表
        for ticket in self.tickets:
            if ticket.start_station == start_station and ticket.end_station == end_station and ticket.seat_num > 0:
                available_tickets.append(ticket)
        return available_tickets

    # 订票
    def book_ticket(self, train_no):
        for ticket in self.tickets:
            if ticket.train_no == train_no and ticket.seat_num > 0:
                ticket.seat_num -= 1
                return "订票成功，车票号为：" + str(random.randint(10000, 99999))
        return "订票失败，该车次无余票"

# 示例代码
if __name__ == '__main__':
    ticket_system = TicketSystem()
    ticket_system.add_ticket("G1001", "北京", "上海", 500, 100)
    ticket_system.add_ticket("G1002", "上海", "北京", 500, 50)
    ticket_system.add_ticket("G1003", "北京", "上海", 500, 80)

    available_tickets = ticket_system.query_tickets("北京", "上海")
    print("查询到的符合条件的车票有：")
    for ticket in available_tickets:
        print(ticket.train_no, ticket.start_station, ticket.end_station, ticket.price, ticket.seat_num)

    print("开始订票...")
    print(ticket_system.book_ticket("G1001"))
    print(ticket_system.book_ticket("G1001"))
    print(ticket_system.book_ticket("G1001"))
    print(ticket_system.book_ticket("G1001"))

这个简单的代码演示了一个火车票订票系统的基本功能，包括添加火车票、查询余票和订票三个功能。通过实例化 TicketSystem 类，我们可以调用其中的方法来实现这些功能。其中订票时，如果该车次有余票，则会将余票数量减 1，并返回一个随机生成的车票号；如果没有余票，则会返回订票失败。