'''用户名和密码存放于文件中，格式为：name|password
启动程序后，先登录，登录成功则让用户输入工资,然后打印商品列表，失败则重新登录
允许用户根据商品编号购买商品
用户选择商品后，检测余额是否够，够就直接扣款，不够就提醒
可随时退出，退出时，打印已购买商品和余额
余额:注册时默认每个用户拥有20000
退出登录，退出后可注册，并重新登录
'''
# 大部分用户输入的情况都考虑到了，基本不会出现bug，功能也应该较为完整
user = {"name":None,'money':None}
money_start = [0]
buy_list = {}
count_money = [0]
def register_check(name):
''' 判断用户名是否被注册'''
with open('users.txt', 'r', encoding='utf8') as f:
data = f.read()
data = data.split("|")
for i in data:
user_info = i.split(':')
username = user_info[0]
if username == name:
return 0
def get_goods():
''' 获取文件中货物并打印成列表'''
with open('goods.txt', 'r', encoding='utf8') as fr:
goods_list = fr.read()
goods_list = eval(goods_list)
return goods_list
goods_list = get_goods()
def get_money(name):
''' 根据用户名从文件中获取钱数'''
money = 0
with open('money.txt', 'r',encoding='utf8') as fr:
data = fr.read()
data = data.split('|')
# 判断是否已有用户名
for i in data:
money_info = i.split(':')
if name == money_info[0]:
money = money_info[1]
return money
def money_in(money):
''' 将购买后剩下的钱放回文件中'''
import os
with open('money.txt', 'r', encoding='utf8') as fr,
open('money1.txt', 'w', encoding='utf8') as fw:
data = fr.read()
data = data.replace(f'{user["name"]}:{money_start[0]}', f'{user["name"]}:{money}')
fw.write(data)
os.remove('money.txt')
os.rename('money1.txt', 'money.txt')
def auto(func):
def wrapper(*args,**kwargs):
if user['name']:
return func(*args,**kwargs)
else:
return login()
return wrapper
def login():
''' 登录系统'''
while True:
name = input("请输入用户名：").strip()
pwd = input("请输入密码：").strip()
inp_user_info = f'{name}:{pwd}' # 将用户名和密码合并成存储的格式，方便比较
with open('users.txt', 'r', encoding='utf8') as f,
open('money.txt', 'r', encoding='utf8') as fr:
user_info = f.read()
money_info = fr.read()
user_info = user_info.split('|')
money_info = money_info.split('|')
if inp_user_info in user_info:
print('登录成功')
user["name"] = name
for i in money_info:
money = i.split(':')
if name == money[0]:
user["money"] = money[1]
money_start[0] = money[1]
break
break
else:
print("用户名或密码错误")
def register():
''' 注册系统'''
while True:
name=input("请输入用户名:").strip()
if register_check(name) == 0:
print('该用户名已被注册')
break
if not user['name']:
pwd=input("请输入密码：").strip()
re_pwd=input("请重复输入密码：").strip()
if pwd==re_pwd:
with open("users.txt", mode="a", encoding="utf8") as f,
open('money.txt', mode='a', encoding='utf8') as fr:
data=f"{name}:{pwd}|"
data1 = f'{name}:{20000}|'
f.write(data)
fr.write(data1)
print("注册成功")
break
else:
print("两次输入的密码不一致")
else:
print('已经登录，无法注册！')
break
@auto
def shopping():
''' 购物系统'''
money = 0
while True:
for i, k in enumerate(goods_list):
print(i, ":", k)
choose = input("请输入你要购买的商品序号(输入q退出):").strip()
if choose.isdigit(): # 判断用户输入是否为数字
choose = int(choose)
if choose < len(goods_list): # 判断用户输入是否超过列表
goods_name = goods_list[choose][0]
goods_price = goods_list[choose][1]
if goods_name in buy_list:
buy_list[goods_name]["count"] += 1
else:
buy_list[goods_name]={'price' : goods_price, 'count': 1}
money += goods_price
count_money[0] = money
print("你购买的商品有：", buy_list)
else:
print("你输入的商品不存在")
elif choose == 'q':
print(f"你购买的商品有：{buy_list}，总价为{money}")
break
else:
print("请输入正确的商品编号")
@auto
def shopping_car():
''' 购物车'''
while True:
print(f'购物车商品:{buy_list}，总价为{count_money}')
goods_choice = input('请问需要删除哪个商品,不需要删除请按q退出')
if goods_choice == 'q':
break
if goods_choice not in buy_list:
print('输入商品错误')
continue
print(buy_list[goods_choice])
buy_list[goods_choice]["count"] -= 1
# 减掉价格
for goods in goods_list:
if goods_choice in goods:
count_money[0] -= goods[1]
@auto
def pay():
''' 支付系统'''
print(f'购物车商品:{buy_list}, 总价:{count_money[0]},您的余额为{user["money"]}')
while True:
choice = input('是否需要支付(Y/y),不支付会清空购物车(N/n):')
if choice == 'Y' or choice == 'y':
money = int(user['money'])-int(count_money[0])
if money < 0:
print('您的余额不足，请减少购物车商品!')
break
else:
user['money'] = money
print(f'支付{count_money[0]}成功,已成功购买{buy_list},余额为{money}')
money_in(money)
break
# 清空购物车
elif choice == 'N' or choice == 'n':
buy_list.clear()
count_money[0] = 0
print('清空购物车成功,欢迎下次光临')
break
else:
print('请按照要求输入！')
@auto
def count():
''' 显示余额'''
print(f'你的余额为：{user["money"]}')
def login_out():
'''退出登录'''
# 判断是否已经登录
global user
if not user["name"]:
print('请先登录')
return
choice = input("是否退出登录（Y/y）")
if choice == 'Y' or choice == 'y':
user = {"name": None, 'money': None}
print(user)
print('您已退出登录')
func_dic = {"1": login, "2": register, "3": shopping, "4": shopping_car, "5": pay, "6": count, "7": login_out}
while True:
print('''
1:登陆
2:注册
3:购物
4:购物车
5:结账
6:余额
7:退出登录
8:退出
''')
choice=input("请输入你想进行的步骤:").strip()
if choice in func_dic :
func_dic[choice]()
elif choice == '8':
break
else:
print("你输入的方法不存在")