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购物车
---要求
1、启动程序后，输入用户名密码后，如果是第一次登录，让用户输入工资，然后打印商品列表2、允许用户根据商品编号购买商品
3、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
4、可随时退出，退出时，打印已购买商品和余额
5、在用户使用过程中， 关键输出，如余额，商品已加入购物车等消息，需高亮显示
6、用户下一次登录后，输入用户名密码，直接回到上次的状态，即上次消费的余额什么的还是那些，再次登录可继续购买
7、允许查询之前的消费记录
main.py
import judgment_user
def main():
with open("user.txt","r",encoding="utf-8") as f:#获取user.txt内容
user_info = f.read() # 显示文本内容
#print(user_info)
user_list = user_info.split() # 加入列表
#print(user_list)
user_dic = {} # 定义空字典
for itme in user_list: # 循环user_list列表
user_list = itme.split("-") # 截取-
#print(user_list)
user_dic[user_list[0]] = user_list[1] # 把文本中的内容截取----后加入字典
#print(user_dic)
count = 0 # count从0开始
while count < 3:
username = input("\033[38;1m请输入用户名-->>\033[0m:")
if username in user_dic: #判断username是否在字典中
#r+为读写模式
with open("lock.txt", "r+", encoding="utf-8") as f:
lock_info = f.read()
lock_list = lock_info.split() #截取文本中的空格
if username in lock_list: # 判断输入的用户是否在被锁定文件中
print("\033[31;1m此用户被锁定,请联系管理员解绑\033[0m")
else:
password = input("\033[38;1m请输入密码-->>\033[0m:")
#print(user_dic)
if password == user_dic[username]:#判断字典中帐号密码是否正确
print("%s:\033[36;1m登录成功!\033[0m"%username)
judgment_user.mkdir(username)
exit()
else:
count +=1 #密码每次错误数量加1
if count==3: #错误3次帐号锁定
f.write('\n'+username)
print("\033[31;1m密码错误3次，帐号已被锁定\033[0m")
else:
print("\033[31;1m密码错误，还可以再试%s次\033[0m"%(3-count))
else:
print("\033[31;1m用户名输入错误！\033[0m")
if __name__ == '__main__':
main()judgment_user.py
import shoppingcart
def mkdir(path):
'判断是否是第一次登录'
# 引入模块
import os
# 去除首位空格
# path = path.strip()
# 去除尾部 \ 符号
# path = path.rstrip("\\")
# 判断路径是否存在
# 存在 True
# 不存在 False
isExists = os.path.exists(path)
# 判断结果
if not isExists:
# 如果不存在则创建目录
print(path + ' 用户第一次登陆')
salary = input("请输入工资:")
# 创建目录操作函数
os.makedirs(path)
shoppingcart.shoppingcart(path, salary)
return True
else:
# 如果目录存在则不创建，并提示目录已存在
print(path + ' 用户已登陆过')
choose = input("\033[36;1m 是否查询之前消费记录(查询请输入y，不查询任意键)-->> \033[0m:")
shoppingcart.Query_the_records(choose, path)
with open('./' + path + "/salary.txt", "r+", encoding="utf-8") as f:
salary = f.read()
print("余额剩余：", salary)
shoppingcart.shoppingcart(path, salary)
return Falseshopppingcart.py
#本模块包换购物车主体函数、购物记录查询函数
def shoppingcart(username,salary):
' 购物车主体函数 '
# salary = input("请输入工资:")
product_list = [
('Iphone',5800),
('mac',9800),
('bike',800),
('watch',5800),
('coffee',31),
('alex',100)
]
shopping_list = []
if salary.isdigit() :
salary = int(salary)
while True:
for item in product_list:
print(product_list.index(item),item)
user_choice = input("选择要买吗,输入q退出>>>:")
if user_choice.isdigit():
user_choice = int(user_choice)
if user_choice < len(product_list) and user_choice >= 0:
p_item = product_list[user_choice]
if p_item[1] <= salary:
shopping_list.append(p_item)
# print(shopping_list, "\033[36;1放入购物车成功!\033[0m")
salary -=p_item[1]
print("\033[36;1m added %s into shopping cart ,your current balance is %s \033[0m" %(p_item,salary))
else:
print("\033[41;1m 你的余额只剩[%s] \033[0m" %salary)
else:
print("product code [%s] is not exist!" %user_choice)
elif user_choice == 'q':
print('------shoping list------')
for p in shopping_list:
with open('./' + username + "/recording.txt", "a+", encoding="utf-8") as f:
p = str(p)
f.write(p+'\n')
print(p)
with open('./' + username + "/salary.txt", "w+", encoding="utf-8") as f:
salary = str(salary)
f.write(salary)
print("your current balance:", salary)
exit()
else:
print("invalid option")
def Query_the_records(choose,username):
'购物车记录查询'
if choose == 'y':
with open('./' + username + "/recording.txt", "r", encoding="utf-8") as f:
recording = f.read() # 显示文本内容
print(recording)
else:
pass流程图
