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 Car
class Bus(Car):
bus_count = 0
def __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 = brand
self.bus_loads = bus_loads
self.day_charge = day_charge
self.deposit = deposit
self.renter = renter
self.renter_contact = renter_contact
self.data_rent = data_rent
self.data_return = data_return
Bus.bus_count += 1
def 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 = 0
def __init__(self, car_id, day_charge=50, deposit=100, rented=False):
self.deposit = deposit
self.day_charge = day_charge
self.car_id = car_id
self.rented = rented
self.renter = ""
self.renter_contact = ""
self.data_rent = ""
self.data_return = ""
Car.car_count += 1
def 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 Renter
def 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 Truck
class 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 newCar
with 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, height
while 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：")
return
rent_opinion = int(input("车辆是否已经出租1.出租 2.未出租："))
if rent_opinion == 1:
rented = True
elif rent_opinion == 2:
rented = False
if 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 = False
newCar = 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":
break
def searchCar(self):
while True:
flag_1 = 0
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_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 = 1
if 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":
break
def 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":
break
def 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_type
while 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 = 1
elif "B" in car_id_key:
car_type = 2
elif "T" in car_id_key:
car_type = 3
pos = 0
for 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 = True
elif opinion == 2:
rented = False
if 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)
break
elif 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)
break
elif 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)
break
pos += 1
flag = input("是否继续修改y/n：")
if flag != "y":
break
if __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,,100,2000Renter.py
from Car import Car
from Sedan import Sedan
from Bus import Bus
from Truck import Truck
from Manage import Manager
class Renter:
cars = Manager.cars_list
with 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 newCar
with 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 car
while 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 = 0
for car in Manager.cars_list:
if car.car_id == car_id_key:
flag = 1
if car.rented == "True":
print("该车已出租")
break
else:
car.rented = True
car.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()
break
if flag == 1:
flag = 0
for 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)
break
flag += 1
else:
print("未找到该车")
flag = input("是否继续租借y/n")
if flag != "y":
break
def returnCar(self):
global car
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("请输入您需要归还的车辆的车牌号：")
flag = 0
for car in Manager.cars_list:
if car.car_id == car_id_key:
flag = 1
if car.rented:
car.rented = False
car.data_return = input("请输入归还日期：")
car.show_msg()
break
if flag == 1:
flag = 0
for 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)
break
flag += 1
else:
print("未找到该车！")
if __name__ == '__main__':
renter = Renter()
Sedan.py
from Car import Car
import sqlite3
con = sqlite3.connect('Car.py')
class Sedan(Car):
sedan_count = 0
def __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 = brand
self.seats = seats
self.day_charge = day_charge
self.deposit = deposit
self.renter = renter
self.renter_contact = renter_contact
self.data_rent = data_rent
self.data_return = data_return
Sedan.sedan_count += 1
def 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 Car
class Truck(Car):
truck_count = 0
def __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 = volume
self.capacity = capacity
self.length = length
self.width = width
self.height = height
self.day_charge = day_charge
self.deposit = deposit
self.renter = renter
self.renter_contact = renter_contact
self.data_rent = data_rent
self.data_return = data_return
Truck.truck_count += 1
def 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 sqlite3
def 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")