Python实现购物车程序

Evan

发布时间：2026-10-13| 6人浏览过

原创

本文介绍了一个基于Python的购物车程序实现。程序支持用户输入工资、浏览商品列表、根据编号选购商品，并自动检测余额。若余额不足，用户可选择充值后继续购买。程序在退出时打印已购商品清单及剩余余额，适合Python初学者学习逻辑控制与数据处理。

本文分享一个Python购物车程序的实现案例，具体细节如下。

功能需求：

程序启动后，首先提示用户输入个人工资，随后展示商品列表。
支持用户通过输入商品编号来选购商品。
当用户选定商品后，系统会自动检查账户余额。如果余额充足，则直接扣除相应金额；如果余额不足，则提示用户。
用户可以在任意时刻选择退出程序，退出时系统将打印已购买的商品清单以及当前剩余余额。
如果余额不足，用户可以选择进行充值操作。

具体代码实现如下：

#coding=utf-8
#Version:python 3.6.0
#Tools:Pycharm 2017.3.2
_date_ = '2018/4/16/016 14:50'
_author_ = 'Hongyong'

salary = int(input("Please input your salary: "))
shoppingmart = []
items = (["1","Huawei","￥",2800],
     ["2","Earphone","￥",300],
     ["3","Book","￥",80])
msg_items = '''
----------items----------
1. Huawei   ￥ 2800
2. Earphone  ￥ 300
3. Book    ￥ 80
-------------------------
'''
print(msg_items)
while True:
  shopindex = int(input("Please choose goods: "))
  if salary > items[shopindex-1][3]:
    shoppingmart.append(items[shopindex-1])
    salary -= int(items[shopindex-1][3])
    print("You have bought {name} !".format(name = items[shopindex-1][1]))
    print("Your balance is: ￥",salary)
    decision = input("Do you want to quit now?")
    print(msg_items)
  else:
    print("Your balance is not enough! Please try sth else.")
    recharge_ans = input("Do you want to recharge?")
    if recharge_ans == "y":
      recharge = int(input("Please input money: "))
      print("Please wait for a while...")
      salary += recharge
      print("You have recharged successfully!")
      print("And the balance is: ",salary,"now!")
    decision = input("Do you want to quit now?")
    print(msg_items)
  if decision == "q":
    break
  else:
    continue
print("You have bought: ",shoppingmart)
print("Your balance is: ￥",salary)
print("Welcome your next coming!")

程序运行效果展示：

Please input your salary: 0
 
----------items----------
1. Huawei   ￥ 2800
2. Earphone  ￥ 300
3. Book    ￥ 80
-------------------------
 
Please choose goods: 1
Your balance is not enough! Please try sth else.
Do you want to recharge?y
Please input money: 30000
Please wait for a while...
You have recharged successfully!
And the balance is: 30000 now!
Do you want to quit now?
 
----------items----------
1. Huawei   ￥ 2800
2. Earphone  ￥ 300
3. Book    ￥ 80
-------------------------
 
Please choose goods: 1
You have bought Huawei !
Your balance is: ￥ 27200
Do you want to quit now?
 
----------items----------
1. Huawei   ￥ 2800
2. Earphone  ￥ 300
3. Book    ￥ 80
-------------------------
 
Please choose goods: 2
You have bought Earphone !
Your balance is: ￥ 26900
Do you want to quit now?q
 
----------items----------
1. Huawei   ￥ 2800
2. Earphone  ￥ 300
3. Book    ￥ 80
-------------------------
 
You have bought: [['1', 'Huawei', '￥', 2800], ['2', 'Earphone', '￥', 300]]
Your balance is: ￥ 26900
Welcome your next coming!

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