简单管理系统的开发——以车辆租赁管理系统为例

一、实现效果（视频演示）

二、代码的简单介绍

本博客实现了一个简单的车辆管理系统，包括两个主要角色：管理员（Manager）和租车人（Renter）。

管理员可以添加车辆、修改车辆信息、查询所有车辆以及查询指定车辆信息。

租车人可以查询车辆信息、租借车辆以及归还车辆。

三、详细代码

Bus.py

from Car import Carclass Bus(Car):bus_count = 0def __init__(self, sedan_id, brand="", bus_loads=30, day_charge=400, deposit=2000,renter="", renter_contact="", data_rent="", data_return="",rented=False):super().__init__(sedan_id, rented=rented)self.brand = brandself.bus_loads = bus_loadsself.day_charge = day_chargeself.deposit = depositself.renter = renterself.renter_contact = renter_contactself.data_rent = data_rentself.data_return = data_returnBus.bus_count += 1def show_msg(self):if self.rented:print(f"车牌:{self.car_id}，车辆是否出租:{self.rented}", end="，")print(f"日租金:{self.day_charge}，押金:{self.deposit}", end="，")print(f"租借人:{self.renter}，租借人联系方式:{self.renter_contact}", end="，")print(f"租借日期:{self.data_rent}，归还日期:{self.data_return}")else:print(f"车牌:{self.car_id}，车辆是否出租：False",end=",")print(f"日租金:{self.day_charge}，押金:{self.deposit}", end="，")if __name__ == '__main__':s1 = Bus("B001", brand="ford", bus_loads=40)s1.show_msg()

Car.py

class Car:car_count = 0def __init__(self, car_id, day_charge=50, deposit=100, rented=False):self.deposit = depositself.day_charge = day_chargeself.car_id = car_idself.rented = rentedself.renter = ""self.renter_contact = ""self.data_rent = ""self.data_return = ""Car.car_count += 1def show_msg(self):if self.rented:print(f"车牌：{self.car_id}，车辆是否出租：{self.rented}", end="，")print(f"日租金：{self.day_charge}，押金：{self.deposit}", end="，")print(f"租借人：{self.renter}，租借人联系方式：{self.renter_contact}", end="，")print(f"租借日期：{self.data_rent}，归还日期：{self.data_return}")else:print(f"车牌：{self.car_id}，车辆是否出租：False", end=",")print(f"日租金：{self.day_charge}，押金：{self.deposit}", end="，")if __name__ == '__main__':car1 = Car("C001")print(f"已经有{car1.car_count}辆车")car1.show_msg()

car_info

C001,False,BYD,5,50,200
C002,True,BYD,5,60,200,AAA,159,5-26,6-1
B001,False,Tesla,20,40,500
B002,True,Tesla,30,80,400,BBB,178,5-26,6-1
T001,False,50,60,6,5,4,90,800
T002,True,40,30,3,2,2,70,600,www,132,3-2,4-1
C004,False,BYD,7,400,2000
B004,False,WWW,80,600,4000
C003,False,BYD,5,600,2000
C005,False,BYD,7,300,2000
C006,False,BYD,5,300,
B003,False,QQQ,35,600,1000
C008,False,BYD,7,600,40000
T005,False,40,50,6,5,,100,2000

main-car.py

from Manage import Manager
from Renter import Renterdef main():opinion = int(input("请选择登录类型(1.管理员，2.用户)："))if opinion == 1:manager = Manager()elif opinion == 2:renter = Renter()if __name__ == '__main__':main()

Manage.py

from Car import Car
from Sedan import Sedan
from Bus import Bus
from Truck import Truckclass Manager:cars_list = []def __init__(self):print("Welcome Manage")self.menu()def menu(self):while True:self.load_info()print("==================")print("   1 添加车辆")print("   2 查询车辆")print("   3 显示所有车辆")print("   4 修改车辆")print("   5 退出系统")print("==================")opinion = int(input("请输入您的选择项："))if opinion == 5:print("5 退出系统")exit()if opinion == 1:print("1 添加车辆")self.addCar()elif opinion == 2:print("2 查询车辆")self.searchCar()elif opinion == 3:print("3 显示所有车辆")self.show_all_cars()elif opinion == 4:print("4 修改车辆")self.changeCar()else:print("输入有误，请重新输入")def load_info(self):# 读取文件global newCarwith open('Manage.txt', 'r') as file:lines = file.readlines()for line in lines:temp = line.split(',')if "C" in temp[0]:car_type = temp[0]rented = temp[1]brand = temp[2]seats = temp[3]day_charge = temp[4]deposit = temp[5]newCar = Sedan(car_type, rented, brand, seats)if rented == True:renter = temp[6]renter_contact = temp[7]data_rent = temp[8]data_return = temp[9].strip()newCar = Sedan(car_type, rented, brand, seats, day_charge, deposit, renter,renter_contact, data_rent, data_return)Manager.cars_list.append(newCar)if "B" in temp[0]:car_type = temp[0]rented = temp[1]brand = temp[2]bus_loads = temp[3]day_charge = temp[4]deposit = temp[5]newCar = Bus(car_type, rented, brand, bus_loads)if rented == True:renter = temp[6]renter_contact = temp[7]data_rent = temp[8]data_return = temp[9].strip()newCar = Bus(car_type, rented, brand, bus_loads, day_charge, deposit, renter,renter_contact, data_rent, data_return)Manager.cars_list.append(newCar)if "T" in temp[0]:car_type = temp[0]rented = temp[1]volume = temp[2]capacity = temp[3]length = temp[4]width = temp[5]height = temp[6]day_charge = temp[7]deposit = temp[8]newCar = Truck(car_type, rented, volume, capacity, length, width, height)if rented == True:renter = temp[9]renter_contact = temp[10]data_rent = temp[11]data_return = temp[12].strip()newCar = Truck(car_type, rented, volume, capacity, length, width, height,day_charge, deposit, renter, renter_contact, data_rent, data_return)Manager.cars_list.append(newCar)def addCar(self):global rented, brand, seats, deposit, data_return, data_rent, renter_contact, day_charge, renter, newCar, bus_loads, volume, length, capacity, width, heightwhile True:opinion = int(input("请选择你要添加的车辆类型1.轿车 2.客车 3.货车："))print("车牌开头按车辆类型区分，C代表轿车，B代表客车，T代表货车")car_type = input("请输入车牌：")for car in Manager.cars_list:if car.car_id == car_type:print(f"车辆{car.car_id}已经存在，请重新输入：")returnrent_opinion = int(input("车辆是否已经出租1.出租 2.未出租："))if rent_opinion == 1:rented = Trueelif rent_opinion == 2:rented = Falseif opinion == 1:  ###轿车if rent_opinion == 1:brand = input("请输入轿车品牌：")seats = str(input("请输入轿车座位数："))day_charge = str(input("请输入日租金"))deposit = str(input("请输入押金"))renter = input("请输入租借人")renter_contact = input("请输入租借人联系方式")data_rent = input("请输入租借日期")data_return = input("请输入归还日期")newCar = Sedan(car_type, rented, brand, seats, day_charge, deposit, renter,renter_contact, data_rent, data_return)with open('Manage.txt', 'a') as file:file.write(f"{car_type},{rented},{brand},{seats},{day_charge},{deposit},{renter},{renter_contact},{data_rent},{data_return}\n")else:brand = input("请输入轿车品牌：")seats = str(input("请输入轿车座位数："))day_charge = str(input("请输入日租金"))deposit = str(input("请输入押金"))rented = FalsenewCar = Sedan(car_type, rented, brand, seats)with open('Manage.txt', 'a') as file:file.write(f"{car_type},{rented},{brand},{seats},{day_charge},{deposit}\n")Manager.cars_list.append(newCar)elif opinion == 2:  ###客车bus_loads = input("请输入客车载客量：")if rent_opinion == 1:brand = input("请输入客车品牌：")day_charge = str(input("请输入日租金"))deposit = str(input("请输入押金"))renter = input("请输入租借人")renter_contact = input("请输入租借人联系方式")data_rent = input("请输入租借日期")data_return = input("请输入归还日期")newCar = Bus(car_type, rented, brand, bus_loads, day_charge, deposit, renter,renter_contact, data_rent, data_return)with open('Manage.txt', 'a') as file:file.write(f"{car_type},{rented},{brand},{bus_loads},{day_charge},{deposit},{renter},{renter_contact},{data_rent},{data_return}\n")else:brand = input("请输入客车品牌：")seats = str(input("请输入客车座位数："))day_charge = str(input("请输入日租金"))deposit = str(input("请输入押金"))newCar = Bus(car_type, rented, brand, bus_loads)with open('Manage.txt','a') as file:file.write(f"{car_type},{rented},{brand},{bus_loads},{day_charge},{deposit}\n")Manager.cars_list.append(newCar)elif opinion == 3:  ###货车if rent_opinion == 1:volume = str(input("请输入载货体积"))capacity = str(input("请输入载货重量"))length = str(input("请输入长"))width = str(input("请输入宽"))height = str(input("请输入高"))day_charge = str(input("请输入日租金"))deposit = str(input(("请输入押金")))renter = input("请输入租借人")renter_contact = input("请输入租借人联系方式")data_rent = input("请输入租借日期")data_return = input("请输入归还日期")newCar = Truck(car_type, rented, volume, capacity, length, width, height,day_charge, deposit, renter, renter_contact, data_rent, data_return)with open('Manage.txt', 'a') as file:file.write(f"{car_type},{rented},{volume},{capacity},{length},{width},{height},{day_charge},{deposit},{renter},{renter_contact},{data_rent},{data_return}\n")else:volume = input("请输入载货体积")capacity = input("请输入载货重量")length = input("请输入长")width = input("请输入宽")height = input("请输入高")day_charge = input("请输入日租金")deposit = input(("请输入押金"))newCar = Truck(car_type, rented, volume, capacity, length, width, height)with open('Manage.txt', 'a') as file:file.write(f"{car_type},{rented},{volume},{capacity},{length},{width},{height},{day_charge},{deposit}\n")Manager.cars_list.append(newCar)print(f"车辆{newCar.car_id}添加成功")flag = input("是否继续添加y/n：")if flag != "y":breakdef searchCar(self):while True:flag_1 = 0print("车牌开头按车辆类型区分，C代表轿车，B代表客车，T代表货车")car_type_key = input("请输入您需要查找的车辆的车牌号：")for car in Manager.cars_list:flag_1 = 1if car.car_id == car_type_key:car.show_msg()if flag_1 == 0:print("输入有误，请重新输入")flag = input("是否继续查找y/n：")if flag != "y":breakdef show_all_cars(self):while True:print(f"已经有{Car.car_count}辆车")for line in Manager.cars_list:line.show_msg()flag = input("是否继续查找y/n：")if flag != "y":breakdef changeCar(self):global brand, seats, deposit, day_charge, data_return, data_rent, renter_contact, renter, newCar, bus_loads, volume, capacity, length, height, width, rented, car_typewhile True:print("车牌开头按车辆类型区分，C代表轿车，B代表客车，T代表货车")car_id_key = input("请输入您需要修改的车辆的车牌号：")if "C" in car_id_key:car_type = 1elif "B" in car_id_key:car_type = 2elif "T" in car_id_key:car_type = 3pos = 0for car in Manager.cars_list:if car.car_id == car_id_key:del (Manager.cars_list[pos])if car_type == 1:print("车牌开头按车辆类型区分，C代表轿车，B代表客车，T代表货车")car_type = input("请输入车牌：")brand = input("请输入轿车品牌：")seats = str(input("请输入轿车座位数："))day_charge = input("请输入日租金：")deposit = input("请输入押金：")elif car_type == 2:print("车牌开头按车辆类型区分，C代表轿车，B代表客车，T代表货车")car_type = input("请输入车牌：")brand = input("请输入客车品牌：")seats = str(input("请输入客车座位数："))day_charge = input("请输入日租金：")deposit = input("请输入押金：")elif car_type == 3:print("车牌开头按车辆类型区分，C代表轿车，B代表客车，T代表货车")car_type = input("请输入车牌：")brand = input("请输入货车品牌：")volume = str(input("请输入载货体积"))capacity = str(input("请输入载货重量"))length = str(input("请输入长"))width = str(input("请输入宽"))height = str(input("请输入高"))day_charge = input("请输入日租金：")deposit = input("请输入押金：")opinion = int(input("车辆是否已经出租1.出租 2.未出租："))if opinion == 1:rented = Trueelif opinion == 2:rented = Falseif rented:renter = input("请输入租借人：")renter_contact = input("请输入租借人联系方式：")data_rent = input("请输入租借日期：")data_return = input("请输入归还日期：")if car_type == 1:if opinion == 1:newCar = Sedan(car_type, rented, brand, seats, day_charge, deposit, renter,renter_contact, data_rent, data_return)else:newCar = Sedan(car_type, rented, brand, seats)Manager.cars_list.insert(pos, newCar)breakelif car_type == 2:if opinion == 1:newCar = Bus(car_type, rented, brand, day_charge, renter,renter_contact, data_rent, data_return)else:newCar = Bus(car_type, rented, brand, bus_loads)Manager.cars_list.insert(pos, newCar)breakelif car_type == 3:if opinion == 1:newCar = Truck(car_type, rented, volume, capacity, length, width, height,day_charge, deposit, renter, renter_contact, data_rent, data_return)else:newCar = Truck(car_type, rented, volume, capacity, length, width, height)Manager.cars_list.insert(pos, newCar)breakpos += 1flag = input("是否继续修改y/n：")if flag != "y":breakif __name__ == '__main__':manager = Manager()

Manage.txt

C001,False,BYD,5,50,200
C002,True,BYD,5,60,200,AAA,159,5-26,6-1
B001,False,Tesla,20,40,500
B002,True,Tesla,30,80,400,BBB,178,5-26,6-1
T001,False,50,60,6,5,4,90,800
T002,True,40,30,3,2,2,70,600,www,132,3-2,4-1
C004,False,BYD,7,400,2000
B004,False,WWW,80,600,4000
C003,False,BYD,5,600,2000
C005,False,BYD,7,300,2000
C006,False,BYD,5,300,
B003,False,QQQ,35,600,1000
C008,False,BYD,7,600,40000
T005,False,40,50,6,5,,100,2000

Renter.py

from Car import Car
from Sedan import Sedan
from Bus import Bus
from Truck import Truck
from Manage import Managerclass Renter:cars = Manager.cars_listwith open('Manage.txt', 'r') as file:str_temp = file.readlines()def __init__(self):print("Welcome Renter")self.menu()def menu(self):while True:self.load_info()print("==================")print("   1 查询车辆")print("   2 租借车辆")print("   3 归还车辆")print("   4 退出系统")print("==================")opinion = int(input("请输入您的选择项："))if opinion == 1:print("1 查询车辆")self.searchCar()elif opinion == 2:print("2 租借车辆")self.rentCar()elif opinion == 3:print("3 归还车辆")self.returnCar()elif opinion == 4:print("4 退出系统")exit()else:print("输入有误，请重新输入")def load_info(self):# 读取文件global newCarwith open('Manage.txt', 'r') as file:str_temp = file.readlines()for line in str_temp:temp = line.split(',')if "C" in temp[0]:car_type = temp[0]rented = temp[1]brand = temp[2]seats = temp[3]day_charge = temp[4]deposit = temp[5]newCar = Sedan(car_type, rented, brand, seats)if rented == True:renter = temp[6]renter_contact = temp[7]data_rent = temp[8]data_return = temp[9].strip()newCar = Sedan(car_type, rented, brand, seats, day_charge, deposit, renter,renter_contact, data_rent, data_return)Manager.cars_list.append(newCar)if "B" in temp[0]:car_type = temp[0]rented = temp[1]brand = temp[2]bus_loads = temp[3]day_charge = temp[4]deposit = temp[5]newCar = Bus(car_type, rented, brand, bus_loads)if rented == True:renter = temp[6]renter_contact = temp[7]data_rent = temp[8]data_return = temp[9].strip()newCar = Bus(car_type, rented, brand, bus_loads, day_charge, deposit, renter,renter_contact, data_rent, data_return)Manager.cars_list.append(newCar)if "T" in temp[0]:car_type = temp[0]rented = temp[1]volume = temp[2]capacity = temp[3]length = temp[4]width = temp[5]height = temp[6]day_charge = temp[7]deposit = temp[8]newCar = Truck(car_type, rented, volume, capacity, length, width, height)if rented == True:renter = temp[9]renter_contact = temp[10]data_rent = temp[11]data_return = temp[12].strip()newCar = Truck(car_type, rented, volume, capacity, length, width, height,day_charge, deposit, renter, renter_contact, data_rent, data_return)Manager.cars_list.append(newCar)def searchCar(self):print("车牌开头按车辆类型区分，C代表轿车，B代表客车，T代表货车")car_id_key = input("请输入您需要查找的车辆的车牌号：")for car in Manager.cars_list:if car.car_id == car_id_key:Car.show_msg(car)def rentCar(self):global carwhile True:print("车牌开头按车辆类型区分，C代表轿车，B代表客车，T代表货车")car_id_key = input("请输入您需要租借的车辆的车牌号：")flag = 0for car in Manager.cars_list:if car.car_id == car_id_key:flag = 1if car.rented == "True":print("该车已出租")breakelse:car.rented = Truecar.renter = input("请输入租借人：")car.renter_contact = str(input("请输入租借人联系方式："))car.data_rent = str(input("请输入租借日期："))car.data_return = "待归还"car.show_msg()breakif flag == 1:flag = 0for key in Renter.str_temp:if car_id_key in key:if "S" in car_id_key:Renter.str_temp[flag] = f"{car.car_id}，{car.rented}，{car.brand}，{car.seats}，" \f"{car.day_charge}，{car.deposit}，{car.renter}，" \f"{car.renter_contact}，{car.data_rent}，待归还\n"if "B" in car_id_key:Renter.str_temp[flag] = f"{car.car_id}，{car.rented}，{car.brand}，{car.bus_loads}，" \f"{car.day_charge}，{car.deposit}，{car.renter}，" \f"{car.renter_contact}，{car.data_rent}，待归还\n"if "T" in car_id_key:Renter.str_temp[flag] = f"{car.car_id}，{car.rented}，{car.volume}，{car.capacity}，" \f"{car.length}，{car.width}，{car.height}，" \f"{car.day_charge}，{car.deposit}，{car.renter}，" \f"{car.renter_contact}，{car.data_rent}，待归还\n"with open('Manage.txt', 'w') as file:for temp in Renter.str_temp:file.write(temp)breakflag += 1else:print("未找到该车")flag = input("是否继续租借y/n")if flag != "y":breakdef returnCar(self):global carprint("车牌开头按车辆类型区分，C代表轿车，B代表客车，T代表货车")car_id_key = input("请输入您需要归还的车辆的车牌号：")flag = 0for car in Manager.cars_list:if car.car_id == car_id_key:flag = 1if car.rented:car.rented = Falsecar.data_return = input("请输入归还日期：")car.show_msg()breakif flag == 1:flag = 0for key in Renter.str_temp:if car_id_key in key:if "S" in car_id_key:Renter.str_temp[flag] = f"{car.car_id}，{car.rented}，{car.brand}，{car.seats}，" \f"{car.day_charge}，{car.deposit}，{car.renter}，" \f"{car.renter_contact}，{car.data_rent}，{car.data_return}\n"if "B" in car_id_key:Renter.str_temp[flag] = f"{car.car_id}，{car.rented}，{car.brand}，{car.bus_loads}，" \f"{car.day_charge}，{car.deposit}，{car.renter}，" \f"{car.renter_contact}，{car.data_rent}，{car.data_return}\n"if "T" in car_id_key:Renter.str_temp[flag] = f"{car.car_id}，{car.rented}，{car.volume}，{car.capacity}，" \f"{car.length}，{car.width}，{car.height}，" \f"{car.day_charge}，{car.deposit}，{car.renter}，" \f"{car.renter_contact}，{car.data_rent}，{car.data_return}\n"with open('car_info', 'w') as file:for temp in Renter.str_temp:file.write(temp)breakflag += 1else:print("未找到该车！")if __name__ == '__main__':renter = Renter()

Sedan.py

from Car import Carimport sqlite3con = sqlite3.connect('Car.py')class Sedan(Car):sedan_count = 0def __init__(self, sedan_id, rented=False, brand="", seats=5, day_charge=200, deposit=1000,renter="", renter_contact="", data_rent="", data_return=""):super().__init__(sedan_id, rented=rented)self.brand = brandself.seats = seatsself.day_charge = day_chargeself.deposit = depositself.renter = renterself.renter_contact = renter_contactself.data_rent = data_rentself.data_return = data_returnSedan.sedan_count += 1def show_msg(self):if self.rented:print(f"车牌：{self.car_id}，车辆是否出租：{self.rented}", end="，")print(f"日租金：{self.day_charge}，押金：{self.deposit}", end="，")print(f"租借人：{self.renter}，租借人联系方式：{self.renter_contact}", end="，")print(f"租借日期：{self.data_rent}，归还日期：{self.data_return}")else:print(f"车牌：{self.car_id}，车辆是否出租：False", end=",")print(f"日租金：{self.day_charge}，押金：{self.deposit}", end="，")if __name__ == '__main__':s1 = Sedan("S001", brand="ford", seats=7)s1.show_msg()

Truck.py

from Car import Carclass Truck(Car):truck_count = 0def __init__(self, sedan_id, volume="20方", capacity="5吨", length="5米", width="2米", height="2米",day_charge=400, deposit=2000, renter="", renter_contact="", data_rent="", data_return="",rented=False):super().__init__(sedan_id, rented=rented)self.volume = volumeself.capacity = capacityself.length = lengthself.width = widthself.height = heightself.day_charge = day_chargeself.deposit = depositself.renter = renterself.renter_contact = renter_contactself.data_rent = data_rentself.data_return = data_returnTruck.truck_count += 1def show_msg(self):if self.rented:print(f"载货体积:{self.volume}，载货重量:{self.capacity}", end="，")print(f"长:{self.length}，宽:{self.width}，高:{self.height}")print(f"车牌:{self.car_id}，车辆是否出租:{self.rented}", end="，")print(f"日租金:{self.day_charge}，押金:{self.deposit}", end="，")print(f"租借人:{self.renter}，租借人联系方式:{self.renter_contact}", end="，")print(f"租借日期:{self.data_rent}，归还日期:{self.data_return}")else:print(f"载货体积:{self.volume}，载货重量:{self.capacity}", end="，")print(f"长:{self.length}，宽:{self.width}，高:{self.height}")print(f"车牌:{self.car_id}，车辆是否出租：False",end=",")print(f"日租金:{self.day_charge}，押金:{self.deposit}", end="，")if __name__ == '__main__':s1 = Truck("T001", volume="21方", capacity="4吨", length="5米", width="2.1米", height="2米")s1.show_msg()

数据库实现租车.py

import sqlite3def opendb():conn = sqlite3.connect("mydb.db")cur = conn.cursor()cur = conn.execute("""create table if not exists car(car_id primary key,rented ,day_charge ,deposit )""")return cur, conn# 查询所有信息
def showalldb():print("-------------处理后数据--------------")hel = opendb()cur = hel[1].cursor()cur.execute("select*from car")res = cur.fetchall()for line in res:for h in line:print(h)print()cur.close()# 输入信息
def into():car_id = input("请输入车牌")rented = input("请输入租借情况")day_charge = input("请输入日租金")deposit = input("请输入押金")return car_id, rented, day_charge, deposit# 网格数据库中添加内容
def adddb():welcome = """------欢迎使用数据库功能--------"""print(welcome)person = into()hel = opendb()hel[1].execute("insert into car(car_id,rented,day_charge,deposit)values(?,?,?,?)",(person[0], person[1], person[2], person[3]))hel[1].commit()print("--------恭喜你，数据添加成功---------")showalldb()hel[1].close()# 修改数据库内容
def alter():welcome = "---------欢迎使用修改数据库功能------"print(welcome)changechoice = input("请输入想要修改的车牌：")hel = opendb()person = into()hel[1].execute("update  car set car_id=?,rented=?, day_charge=?,deposit=?where car" + changechoice,(person[0], person[1], person[2], person[3]))hel[1].commit()showalldb()hel[1].close()# 查询数据
def searchdb():welcome = "--------欢迎使用数据库查询功能-------"print(welcome)choice = input("请输入查询的方式，如（车牌，租借情况，日租金，押金）")searlist = ['', '']if choice == "车牌":searlist[0] = "car_id"searlist[1] = input("请输入车牌：")elif choice == "租借情况":searlist[0] = "rented"searlist[1] = input("请输入租借情况")elif choice == "日租金":searlist[0] = "day_charge"searlist[1] = input("请输入日租金")elif choice == "押金":searlist[0] = "deposit"searlist[1]=input("请输入押金")hel = opendb()cur = hel[1].cursor()cur.execute("select*from car where " + searlist[0] + "=" + searlist[1])hel[1].commit()print("--------查询的数据如下------")for row in cur:print(row[0], row[1], row[2], row[3])cur.close()hel[1].close()if __name__ == '__main__':while True:print("==================")print("   1 添加车辆")print("   2 查询车辆")print("   3 显示所有车辆")print("   4 修改车辆")print("   5 退出系统")print("==================")opinion = int(input("请输入您的选择项："))if opinion == 5:print("5 退出系统")exit()if opinion == 1:print("1 添加车辆")adddb()elif opinion == 2:print("2 查询车辆")searchdb()elif opinion == 3:print("3 显示所有车辆")showalldb()elif opinion == 4:print("4 修改车辆")alter()else:print("输入有误，请重新输入")

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