用python写一个机票预订系统

好的，机票预订系统可以分为以下几个部分：

1. 用户登录/注册模块
2. 航班查询模块
3. 航班订购模块
4. 订单管理模块

下面是一个简单的代码示例：

1. 用户登录/注册模块

import json

# 用户注册
def register(username, password):
    with open('users.json', 'r') as f:
        users = json.load(f)
    if username in users:
        return False
    users[username] = password
    with open('users.json', 'w') as f:
        json.dump(users, f)
    return True

# 用户登录
def login(username, password):
    with open('users.json', 'r') as f:
        users = json.load(f)
    if username not in users or users[username] != password:
        return False
    return True

2. 航班查询模块

import csv

# 查询航班信息
def search_flight(departure, destination, date):
    with open('flights.csv', 'r') as f:
        flights = csv.reader(f)
        for flight in flights:
            if flight[0] == departure and flight[1] == destination and flight[2] == date:
                return flight
    return None

3. 航班订购模块

import random

# 生成订单号
def generate_order_id():
    return str(random.randint(10000000, 99999999))

# 订购航班
def book_flight(username, flight):
    order_id = generate_order_id()
    with open('orders.json', 'r') as f:
        orders = json.load(f)
    if username not in orders:
        orders[username] = []
    orders[username].append({
        'order_id': order_id,
        'flight': flight
    })
    with open('orders.json', 'w') as f:
        json.dump(orders, f)
    return order_id

4. 订单管理模块

# 获取用户订单
def get_orders(username):
    with open('orders.json', 'r') as f:
        orders = json.load(f)
    if username not in orders:
        return []
    return orders[username]

# 取消订单
def cancel_order(username, order_id):
    with open('orders.json', 'r') as f:
        orders = json.load(f)
    if username not in orders:
        return False
    for order in orders[username]:
        if order['order_id'] == order_id:
            orders[username].remove(order)
            with open('orders.json', 'w') as f:
                json.dump(orders, f)
            return True
    return False

以上是一个简单的机票预订系统代码示例，仅供参考。实际开发中需要根据具体需求进行修改和完善。