Python编写车票订购系统，快递收费系统

Python课的期末作业
要求：
1.上网查询郑州到北京，西安，石家庄，济南，太原，武汉的距离及票价，用数据库保存车次信息
2.要求输入目的地，能够查询到里程和票价
3.用数据库存储每一次售票记录，包括售票流水号，起点站，终点站，里程，金额等数据，并统计所有存储记录的总售票金额及各站的旅客流量（进站流量+出站流量）
4.能够打印票据信息，包括订票人信息，票价，票据号，车次等信息

import sqlite3
import os
import time
def createDB():
   """
      创建并初始化数据库
   """
   # 原始数据
   info = [("G1564", "郑州", "北京", "309", "693"), ("G802", "郑州", "北京", "315", "693"), ("G564", "郑州", "北京", "326.5", "693"),
         ("G2025", "郑州", "西安", "239", "479.3"), ("D311", "郑州", "西安", "159", "479.3"), ("G857", "郑州", "西安", "229", "479.3"),
         ("G1286", "郑州", "石家庄", "189.5", "417.9"), ("G2070", "郑州", "石家庄", "196", "417.9"), ("G430", "郑州", "石家庄", "208", "417.9"),
         ("G2074", "郑州", "济南", "303", "446"), ("G258", "郑州", "济南", "312.5", "446"), ("G1844", "郑州", "济南", "298.5", "446"),
         ("D290", "郑州", "太原", "189", "432.7"), ("D3348", "郑州", "太原", "153", "432.7"), ("D2782", "郑州", "太原", "171", "432.7"),
         ("G1991", "郑州", "武汉", "244", "509.8"), ("G3203", "郑州", "武汉", "314", "509.8"), ("G8171", "郑州", "武汉", "248", "509.8")]
   con = sqlite3.connect("DB.db")#连接到数据库
   cur = con.cursor()     # 创建游标对象
   # 创建字段，num是车次,station是始发站,destination是目的地,price票价,distance是距离
   cur.execute("create table test(num primary key, station, destination, price, distance)")
   for i in info:
      cur.execute("insert into test values(?,?,?,?,?)", i)
   con.commit()
   cur.close()
   con.close()
def CreateSaleDB():
   """
   创建销售数据库
   """
   con = sqlite3.connect("sale.db")
   cur = con.cursor()
   # 字段依次为流水号，起点站，终点站，金额，里程
   cur.execute("create table sheet(num,station,destination,price,distance)")
   con.commit()
   cur.close()
   con.close()

# 根据目的地查询车票信息
def Query(dest):
   con = sqlite3.connect("DB.db")
   cur = con.cursor()
   item = cur.execute("select * from test where destination=?", (dest,))
   print("--------------------------查询到的信息--------------------------")
   for i in item.fetchall():
      print("车次：%s      %s==>%s       票价：%s元    距离：%skm" % (i[0], i[1]