购物车程序

Posted 2020-10-20 armyluzhanjun

# Author:Army lu

import os

def admin():
    product_list = []
    with open(‘products.txt‘,‘r‘,encoding=‘utf-8‘) as f:
        for line in f:
            product_list.append(line.strip(‘\n‘).split(‘,‘))
    for i in range(len(product_list)):
        print(‘%s,%s,%s‘%(i,product_list[i][0],product_list[i][1]))
    admin_act = input(‘\n\n"A" for add\n"E" for edit\n"D" for delete\n"Q" for quite\nwhat do you want to do: ‘)
    if admin_act ==‘A‘:
        product_name = input(‘please input the product name:‘)
        product_price = input(‘please input the product price:‘)
        while not product_price.isdigit():
            product_price = input(‘please input the product price:‘)
        product_new =[product_name,int(product_price)]
        product_list.append(product_new)

    elif admin_act ==‘E‘:
        edit_num = input(‘please input the number which you want to edit:‘)
        while not edit_num.isdigit():
            edit_num = input(‘please input the number which you want to edit:‘)
        if int(edit_num) <= len(product_list)-1:
            edit_price = input(‘please input the price:‘)
            while not edit_price.isdigit():
                edit_price = input(‘please input the price:‘)
            product_list[int(edit_num)][1] = int(edit_price)
    elif admin_act ==‘D‘:
        del_num = input(‘please input the number which you want to delete:‘)
        while not del_num.isdigit():
            del_num = input(‘please input the number which you want to delete:‘)

        if int(del_num) <= len(product_list)-1:
            del product_list[int(del_num)]
    elif admin_act == ‘Q‘:
        exit()
    else:
        pass

    for i in range(len(product_list)):
        print(‘%s,%s,%s‘%(i,product_list[i][0],product_list[i][1]))
    user_comfirm = input(‘Please confirm the change (Y/N):‘)
    if user_comfirm == ‘Y‘:
        with open(‘products.txt‘, ‘w‘, encoding=‘utf-8‘) as f:
            for i in range(len(product_list)):
                f.write(‘%s,%s\n‘ % (product_list[i][0], product_list[i][1]))
    user_continue = input(‘Contine? (Y/N):‘)
    if user_continue == ‘Y‘:
        admin()


def user():
    #用户登录
    user_list = []
    user_name = input(‘Please input your name:‘)
    user_key = ‘‘
    user_account = 0
    user_exist = False
    user_info = []
    with open(‘users.txt‘,‘r‘,encoding=‘utf-8‘) as f:
        for line in f:
            user_info = line.split(‘,‘)
            user_info[2] = int(user_info[2])
            if user_name == user_info[0]:
                user_exist = True
                user_key = user_info[1]
                user_account = user_info[2]
                if input(‘Please input the key:‘) != user_key:
                    print(‘Please check your key.‘)
                    exit()
                print(‘========Welcome :%s======\nyour account: %d‘%(user_name,user_account))
                account_add = input(‘Do you want to add your account? If Yes,please input the num:‘)
                if account_add.isdigit():
                    user_account += int(account_add)
                    print(‘====== your account:%s‘%user_account)
            user_list.append(line.strip(‘\n‘).split(‘,‘))
    if user_exist == False:
        user_key = input(‘Welcome new user,please input your key:‘)
        while len(user_key) == 0:
            user_key = input(‘Welcome new user,please input your key:‘)
        user_account = input(‘Please input your salary:‘)
        if user_account.isdigit():
            user_account = int(user_account)
        else:
            print(‘Please input the right number.See you again!‘)
            exit()

    #生成产品清单
    product_list = []
    min_price = 1000000
    with open(‘products.txt‘,‘r‘,encoding=‘utf-8‘) as f:
        for line in f:
            product_list.append(line.strip(‘\n‘).split(‘,‘))
        for i in range(len(product_list)):
            product_list[i][1] = int(product_list[i][1] )
            if min_price > product_list[i][1]:min_price = product_list[i][1]
    #循环购物
    shopping_list=[]
    while user_account> min_price:
        for index, item in enumerate(product_list):
            print(index, item)
        print(‘your account:\033[31;1m%s\033[0m‘%user_account)
        choose_num = input(‘Please input the num of the productions or "q" for quit:‘)
        if choose_num.isdigit():
            choose_num = int(choose_num)
            if choose_num <= len(product_list) and product_list[choose_num][1] <= user_account:
                shopping_list.append(choose_num)
                user_account -=product_list[choose_num][1]
        elif choose_num == ‘q‘:
            break
        else:
            print(‘Please input the right num!‘)

    # 写入日志
    user_record =[user_name,user_key,user_account]
    if user_exist == True:
        for i in range(len(user_list)):
            if user_list[i][0] == user_name:
                user_list[i][2] = user_account
                break
    else:
        user_list.append(user_record)

    with open(‘users.txt‘, ‘w‘, encoding=‘utf-8‘) as f:
        for i in range(len(user_list)):
            f.write(‘%s,%s,%s\n‘%(user_list[i][0],user_list[i][1],user_list[i][2]))

    #打印清单
    print(‘========Thanks for shopping======‘)
    print(‘your account:%s‘%user_account)
    print(‘your shoppinglist:‘)
    if len(shopping_list) == 0:
        print(‘you buy nothing!‘)
    else:
        for i in range(len(shopping_list)):
            print(i+1,product_list[shopping_list[i]])

auth = input(‘user or admin,please type "U" or A:‘)
if auth == ‘U‘:
    user()
elif auth == ‘A‘:
    admin_key = input(‘please input the key:‘)
    if admin_key == ‘admin‘:
        admin()
else:
    exit()

第一个稍微有点完整的Python小程序。好多垃圾代码。没办法，零基础。

Mark 一下，文件操作部分有待加强。

with 结束后不能对文件操作。os.remove 和os.rename 提示出错。