牛掰！10年python爬虫经验开发的案例让你搞定全球80%以上的网站

news/2024/5/20 3:31:09/文章来源:https://blog.csdn.net/weixin_45287871/article/details/100838103

项目要求：

用户入口

1、商品信息存在文件里

2、已购商品，余额记录。

商家入口

可以添加商品，修改商品价格

商家入口：

# Author:P J Jimport osps = '''
1 >>>>>> 修改商品
2 >>>>>> 添加商品
按q为退出程序
'''# 打开两个文件，f文件为原来存取商品文件,f_new文件为修改后的商品文件
f = open('commodit', 'r', encoding='utf-8')
f_new = open('commodit_update', 'w+', encoding='utf-8')
file_list = f.readlines()# 打印商品信息
while True:productslist = []# 从商品文件中读取出来的数据存放到productslist列表里for line in file_list:productname = line.strip().split()productname, oldprice = line.strip("\n").split()productslist.append([productname, int(oldprice)])choose = input("%s请选择：" %ps)if choose =='1':for index, item in enumerate(productslist):print(index, item)productindex = input("请输入要修改价格的商品序号:")if productindex.isdigit():productindex = int(productindex)while True:print('要修改商品信息:', productslist[productindex])price = input("请输入要修改的价格:")if price.isdigit():price = int(price)productslist[productindex][1]=pricebreakelse:print("请正确的输入价格！")continue#已经修改好的商品列表循环写入f_new文件夹for products in productslist:insert_data = "%s %s" %(products[0],products[1])f_new.write(insert_data+'\n')print("商品价格已经修改！")# 替换原来的文件f_new = open('commodit_update', 'r', encoding='utf-8')data = f_new.readlines()f = open('commodit', 'w+', encoding='utf-8')for line in data:f.write(line)f.close()f_new.close()#删除替换文件os.remove('commodit_update')elif choose =='2':# 添加商品f = open('commodit', 'a+', encoding='utf-8')pricename = input("请输入商品名:")while True:price = input("请输入商品价格:")if price.isdigit():f.writelines('%s %s\n' % (pricename, price))breakelse:print('输入错误请重新输入!')continuef.close()continueelif choose =='q':breakelse:print("输入错误请重新输入")continue

买家入口：

# Author:P J Jproductslist = []
f = open('commodit','r',encoding='utf-8')
for line in f:productname,price = line.strip('\n').split()productslist.append((productname,int(price)))print(productslist)
shopping_list = []salary = input("请输入你的现金:")
if salary.isdigit():salary = int(salary)while True:# for item in productslist:#  print(productslist.index(item),item)for index,item in enumerate(productslist):print(index,item)#判断用户要输入user_choice = input("请选择要买什啥>>>:")if user_choice.isdigit():user_choice = int(user_choice)if user_choice < len(productslist) and user_choice >= 0:p_item = productslist[user_choice]if p_item[1] <= salary: #买得起shopping_list.append(p_item)salary -=p_item[1]print("加入 %s 购物车你的余额是\033[31;1m%s\033[0mRMB" %(p_item,salary))else:print("\033[32;1m 你的余额只剩[%s]RMB啦，还买个毛线\033[0m " %salary)else:print("\033[41;1m您输入的商品不存在，请重新输入!\033[0m")elif user_choice == 'q':print("----shopping_list----")for p in shopping_list:print(p)print("你的余额:\033[31;1m%s\033[0mRMB" %salary)#简单的余额记录f = open('salary','w+',encoding='utf-8')f.writelines(str(salary))f.closeexit()else:print("错误选项")

操作流程：