作业-0611

#1、编写文件copy工具
with open('a.txt', mode='rt') as read_f, \
        open('b.txt', mode='wt') as write_f:
    data = read_f.read()
    write_f.write(data)
#2、编写简单购物车程序，自己分析逻辑，完成编程：
# 先要求用户注册
name = input('请输入注册账号>>')
psd = input('请输入注册密码>>')
with open('c.txt',mode='at',encoding='utf-8') as f1:
    f1.write('%s:%s\n'%(name,psd))
# 注册完成后，可以登录
inp_name = input("请输入您的登陆账号>>：").strip()
in_pwd = input("请输入您的登陆密码>>：").strip()
with open('c.txt', mode='rt', encoding='utf-8')as f2:
    for line in f2:
        name,pwd = line.strip("\n").split(':')
        if inp_name == name and in_pwd == pwd:
            print('登录成功')
            break
        else:
            print('账号密码输入错误')
f2.close()
# 登录成功后，从文件中读取商品信息（名字、价钱）展示给用户
with open('d.txt', mode='rt', encoding='utf-8')as f3:
    for item in f3:
        goods_name, goods_price = item.strip("\n").split(':')
        print('%s:%s\n'%( goods_name, goods_price ))
# 用户可以选择要购买的商品和购买的个数
goods=[]
while True:
    for item in f3:
        for key, value in item.items():
        choice=input('商品>>: ').strip()
        if choice not in f3:
            continue
        count=input('购买个数>>: ').strip()
        if not count.isdigit():
            continue
        goods.append(choice,count)
        print(goods)