python —— 小小商城 （用户注册、登陆、浏览购买商品...）

            #
            !/usr/bin/env pyhton
            
#
             -*- conding:utf-8 -*-
            
# 文件夹自己建
import os
import sys
import time
from datetime import datetime


CUN_NAME = None
CARS = {}
dong = ‘冻结账户的文件.txt‘def user_login(func):
    def inner():
        ifnot CUN_NAME:
            print(‘*************请先登录*************‘)
            time.sleep(2)
            return
        func()

    return inner


# 用户注册def register():
    print(‘********用户注册**********‘)
    while True:
        flag = True
        get_name = input(‘请输入要注册的用户名(n/N:退出)：‘)
        if get_name.upper() == ‘N‘:
            sys.exit()
        get_pwd = input(‘请输入密码:‘)
        get_date = datetime.now().strftime(‘%Y-%m-%d‘)  # 获得注册日期ifnot os.path.exists(‘用户信息.txt‘):
            open(‘用户信息.txt‘, mode=‘w‘)
        with open(‘用户信息.txt‘, ‘a+‘) as files:
            for line in files.readlines():
                a, b, c = line.strip().split(‘|‘)
                if get_name == a:
                    print(‘用户名已存在，请重新输入！‘)
                    flag = False
        ifnot flag:
            continue
        with open(‘用户信息.txt‘, mode=‘a‘, encoding=‘utf-8‘)as file:
            msg = ‘%s|%s|%s\n‘ % (get_name, get_pwd, get_date)
            file.write(msg)


def is_sucss(username, passwd):
    flag = False
    user_exist = False
    ifnot os.path.exists(‘用户信息.txt‘):
        open(‘用户信息.txt‘, mode=‘w‘, encoding=‘utf-8‘)
    with open(‘用户信息.txt‘, mode=‘r‘, encoding=‘utf-8‘)as file:
        for userinfo in file.readlines():
            a, b, c = userinfo.strip().split(‘|‘)
            if a == username:
                user_exist = True
            if a == username and b == passwd:
                print(‘登陆成功‘)
                global CUN_NAME
                flag = True
                CUN_NAME = username
        return user_exist, flag


# 检查是否冻结def freeze(username):
    ifnot os.path.exists(dong):
        return False
    with open(dong, ‘r‘, encoding=‘utf-8‘) as file_Dong:
        for line in file_Dong.readlines():
            if username == line.strip():
                print(‘用户已经被冻结,无法登录，请另外注册！‘)
                return True
# 用户登陆def login():
    print(‘****用户登陆****‘)
    count = 0
    while True:
        user = input(‘请输入登录用户名:‘)
        pwd = input(‘请输入登录密码:‘)
        with open(‘用户信息.txt‘, ‘r‘, encoding=‘utf-8‘) as file_data:
            for line in file_data.readlines():
                line = line.strip().split(‘|‘)
                if user == line[0] and pwd == line[1]:
                    print(‘登录成功‘)
                    returnelif user == line[0]:
                    print(‘用户密码错误,请重新输入‘)
                    count += 1
                    if count == 3:
                        with open(dong, ‘a‘, encoding=‘utf-8‘) as file2:
                            file2.write(user + ‘\n‘)
                        print(‘用户被冻结‘)
                        returnprint(‘用户不存在,请注册后登录‘)

            return# 分页浏览商品
@user_login
def shopping():
    while True:
        li = []
        with open(‘goods.txt‘, mode=‘r‘, encoding=‘utf-8‘)as pag:
            ff = pag.readline()
            for n in pag.readlines():
                li.append(n)
        meiye = 5
        a, b = divmod(len(li), meiye)
        page = input(‘请选择页码，最多可选%s页‘ % (a + 1))
        if page.isdecimal() and int(page) <= (a + 1):
            start = (int(page) - 1) * meiye
            end = start + meiye
        else:
            print(‘输入页码有误‘)
            continuewhile True:
            count = 0
            goods_cars = {}
            print(‘##############商品列表##############‘)
            with open(‘goods.txt‘, mode=‘r‘, encoding=‘utf-8‘)as goods_file:
                for goods_list in goods_file.readlines():
                    count += 1
                    if count > end:
                        breakif count >= start:
                        a, b, c = goods_list.strip().split(‘|‘)
                        goods_cars[a] = {‘title‘: b, ‘price‘: c}
                for k, v in goods_cars.items():
                    print(k, v[‘title‘], v[‘price‘])
            choose = input(r‘选择你要得商品(N/n)重新选页(Y/y)结束购买‘)
            if choose.upper() == ‘N‘:
                breakif choose.upper() == ‘Y‘:
                path_all = os.path.join(‘shopping_car‘, CUN_NAME)
                ifnot os.path.exists(path_all):
                    os.makedirs(path_all)
                ctime = datetime.now().strftime(‘%Y-%m-%d_%H_%M_%S‘)
                file_path = os.path.join(path_all, ctime)
                print(file_path)
                for k, v in CARS.items():
                    line = ‘%s|%s|%s|%s\n‘ % (k, v[‘title‘], v[‘price‘], v[‘count‘])
                    with open(file_path, mode=‘a‘, encoding=‘utf-8‘)as ff:
                        ff.write(line)
                return
            num = input(‘输入需要购买的数量‘)
            if choose in CARS:
                print(‘商品已在购物车‘)
                CARS[choose][‘count‘] += int(num)
                print(CARS)
                continue
            CARS[choose] = {‘title‘: goods_cars[choose][‘title‘], ‘price‘: goods_cars[choose][‘price‘],
                            ‘count‘: int(num)}
            print(CARS)


@user_login
def cars():
    path = os.path.join(‘购物车‘, CUN_NAME)
    ifnot os.path.exists(path):
        print(‘此账号没购物‘)
        return
    path_list = os.listdir(path)
    for n in path_list:
        file_path = os.path.join(path, n)
        with open(file_path, mode=‘r‘, encoding=‘utf-8‘)as file:
            print(n)
            for x in file.readlines():
                print(‘\t\t‘ + x.strip())
        time.sleep(2)


# 用户选择def main_page():
    while True:
        print(‘******欢迎来到韦礼维的小店******\n1.用户注册\n2.用户登陆\n3.查看购物车\n4.浏览商品‘)
        info = {1: login, 2: register, 3: cars, 4: shopping}
        choices = input(‘请选择序号(输入N/n退出)：‘)
        func = info.get(int(choices))
        if choices == ‘N‘or‘n‘:
            breakifnot func:
            print(‘序号选择错误,请重新选择:‘)
            continue
        func()

if__name__ == ‘__main__‘:
    main_page()