一、今日作业
1、编写文件copy工具
with open("a.txt",mode="r",encoding="utf-8") as f1 ,open("b.txt",mode="w",encoding="utf-8") as f2:
f2.write(f1.read())
2、编写登录程序,账号密码来自于文件
user_inp = input("请输入用户名:")
pwd_inp = input("请输入密码:")
with open("a.txt",mode="r",encoding="utf-8") as f :
for line in f:
username,password = line.strip().split(":")
if username == user_inp and password == pwd_inp:
print("登录成功")
break
else:
print("账号或秘密错误")
3、编写注册程序,账号密码来存入文件
username = input("请输入账号:").strip()
password = input("请输入密码:")
with open("b.txt","a",encoding="utf-8") as f :
f.write("
{}:{}".format(username,password))
二、周末综合作业:
1、编写用户登录接口
1、输入账号密码完成验证,验证通过后输出"登录成功"
2、可以登录不同的用户
3、同一账号输错三次锁定,(提示:锁定的用户存入文件中,这样才能保证程序关闭后,该用户仍然被锁定)
import os
count = 0
tag = True
list1 = []
while tag:
username = input("请输入用户名:")
if os.path.exists("locked{}".format(username)):
print("用户被锁定")
count=0
break
password = input("请输入密码:")
with open("a.txt",mode="r",encoding="utf-8") as f :
for line in f :
user,pwd = line.strip().split(":")
if username == user and password == pwd:
print("登录成功")
tag = False
break
else:
if list1.count(username) ==2:
with open("locked{}".format(username),"w") as f :
print("错误3次该用户被锁定")
else:
list1.append(username)
print(list1.count(username))
print("登录失败")
2、编写程序实现用户注册后,可以登录
import os
list2=[]
list1=["1","2","3"]
while True:
print('''
1.注册
2.登录
3.退出
''')
cmd = input("cmd>")
tag=True
if cmd == list1[0]:
username = input("请输入你要注册的账号:")
password = input("请输入你要注册的密码:")
with open("a.txt","a",encoding="utf-8") as f :
f.write(f"{username}:{password}
")
elif cmd == list1[1]:
while tag:
use_inp = input("请输入你的用户名:")
if os.path.exists(f"locked/{use_inp}"):
print("账号被锁定")
tag = False
break
else:
pwd_inp = input("请输入你的密码:")
with open("a.txt","r",encoding="utf-8") as f :
for line in f :
username,password=line.strip().split(":")
if use_inp==username and password==pwd_inp:
print("登录成功")
tag = False
break
else:
if list2.count(use_inp) == 2:
with open(f"locked/{use_inp}","w",encoding="utf-8") :
pass
print("账号被锁定")
break
else:
print("输入错误")
list2.append(use_inp)
print(list2.count(use_inp))
elif cmd == list1[2]:
break
else:
print("非法输入")