8.07 课后作业

文件a.txt内容：每一行内容分别为商品名字，价钱，个数，求出本次购物花费的总钱数

# a.txt apple 10 3 tesla 100000 1 mac 3000 2 lenovo 30000 3 chicken 10 3 with open(r'C:\Users\青柠\Desktop\正课\a','rt') as t: data = t.readlines() s = 0 for i in data: i = i.replace('\n','') i = i.split() s += int(i[1])*int(i[2]) print(s)

编写注册函数

将用户信息保存到文件内，用户信息可保存为nick:123|sean:456|tank:789 def regist(name_in,pwd_in): with open(r'C:\Users\青柠\Desktop\正课\a','at') as t: data = t.write(f'|{name_in}:{pwd_in}') name_in = input('请输入id：') pwd_in = input('请输入pwd：') regist(name_in,pwd_in)

编写登录函数

从文件内读取用户信息进行身份识别 def login(name_in,pwd_in): with open(r'C:\Users\青柠\Desktop\正课\a', 'rt') as t: data = t.readline() data = data.split('|') dic = {} for i in data: i = i.split(':') dic[i[0]] = i[1] while True: if name_in not in dic.keys(): print('没有这个用户！请再次启动该程序进行登录！') break if pwd_in == dic[name_in]: print('登陆成功！') break name_in = input('请输入id：') pwd_in = input('请输入pwd：') login(name_in,pwd_in)

转载于:https://www.cnblogs.com/dadazunzhe/p/11317371.html

相关资源：JAVA上百实例源码以及开源项目