假定某民航机场共有 N 个航班，每个航班都有航班号，起始站，终点站，飞 行时间（星期几，几点）和一定的成员定额。 设计一个飞机订票系统，能提供下列服务。 （1）航班信息录入功能（用文件保存） （2）航班信息浏览功能。 （3）查询功能：按航班号查询、按起点站查询、按终点站查询、按飞行时 间查询。 （4）功能选择用菜单实现（菜单可用字符串输出，或用 Tkinter 实现）编写Python代码

好的，我可以提供一份Python代码作为参考，实现上述的飞机订票系统。以下是代码：

import csv

# 定义航班信息类
class Flight:
    def __init__(self, flight_no, start, end, day, time, seat):
        self.flight_no = flight_no
        self.start = start
        self.end = end
        self.day = day
        self.time = time
        self.seat = seat

# 定义航班信息存储函数
def save_flight(flight_list):
    with open('flight.csv', 'w', newline='') as file:
        writer = csv.writer(file)
        for flight in flight_list:
            writer.writerow([flight.flight_no, flight.start, flight.end, flight.day, flight.time, flight.seat])

# 定义航班信息读取函数
def load_flight():
    flight_list = []
    with open('flight.csv', 'r') as file:
        reader = csv.reader(file)
        for row in reader:
            flight = Flight(row[0], row[1], row[2], row[3], row[4], row[5])
            flight_list.append(flight)
    return flight_list

# 定义航班信息浏览函数
def view_flight(flight_list):
    for flight in flight_list:
        print("航班号：{}，起始站：{}，终点站：{}，飞行时间：星期{}，{}点，成员定额：{}".format(flight.flight_no, flight.start, flight.end, flight.day, flight.time, flight.seat))

# 定义按航班号查询函数
def search_flight_by_no(flight_list, flight_no):
    result_list = []
    for flight in flight_list:
        if flight.flight_no == flight_no:
            result_list.append(flight)
    return result_list

# 定义按起点站查询函数
def search_flight_by_start(flight_list, start):
    result_list = []
    for flight in flight_list:
        if flight.start == start:
            result_list.append(flight)
    return result_list

# 定义按终点站查询函数
def search_flight_by_end(flight_list, end):
    result_list = []
    for flight in flight_list:
        if flight.end == end:
            result_list.append(flight)
    return result_list

# 定义按飞行时间查询函数
def search_flight_by_time(flight_list, day, time):
    result_list = []
    for flight in flight_list:
        if flight.day == day and flight.time == time:
            result_list.append(flight)
    return result_list

# 定义菜单函数
def menu():
    print("1. 录入航班信息")
    print("2. 浏览航班信息")
    print("3. 按航班号查询")
    print("4. 按起点站查询")
    print("5. 按终点站查询")
    print("6. 按飞行时间查询")
    print("0. 退出系统")

# 主程序
if __name__ == "__main__":
    flight_list = []  # 航班信息列表
    while True:
        menu()  # 显示菜单
        choice = input("请输入功能编号：")  # 读取用户输入
        if choice == '1':  # 录入航班信息
            flight_no = input("请输入航班号：")
            start = input("请输入起始站：")
            end = input("请输入终点站：")
            day = input("请输入飞行时间（星期几）：")
            time = input("请输入飞行时间（几点）：")
            seat = input("请输入成员定额：")
            flight = Flight(flight_no, start, end, day, time, seat)
            flight_list.append(flight)
            save_flight(flight_list)
        elif choice == '2':  # 浏览航班信息
            flight_list = load_flight()
            view_flight(flight_list)
        elif choice == '3':  # 按航班号查询
            flight_list = load_flight()
            flight_no = input("请输入航班号：")
            result_list = search_flight_by_no(flight_list, flight_no)
            view_flight(result_list)
        elif choice == '4':  # 按起点站查询
            flight_list = load_flight()
            start = input("请输入起点站：")
            result_list = search_flight_by_start(flight_list, start)
            view_flight(result_list)
        elif choice == '5':  # 按终点站查询
            flight_list = load_flight()
            end = input("请输入终点站：")
            result_list = search_flight_by_end(flight_list, end)
            view_flight(result_list)
        elif choice == '6':  # 按飞行时间查询
            flight_list = load_flight()
            day = input("请输入飞行时间（星期几）：")
            time = input("请输入飞行时间（几点）：")
            result_list = search_flight_by_time(flight_list, day, time)
            view_flight(result_list)
        elif choice == '0':  # 退出系统
            print("感谢使用，再见！")
            break
        else:
            print("输入错误，请重新输入！")

这份代码实现了航班信息的录入、浏览、查询和菜单等功能，使用了CSV文件进行航班信息的存储和读取。可以根据具体需求进行修改和扩展。