auto save

diy2.py

-username = "python"
-userpassword = "123456"
-i=3
-while i>0:
-    name = input("请输入用户名:")
-    password = input("请输入密码:")
-    i=i-1
-    if name == username and password == userpassword:
-        print("登录成功!")
-        break
-    elif:
-         name!=username:
-        print("用户名错误，请再次输入")
-        print("你还有"+str(i)+"次等入机会")
-    else:
-        password!=userpassword:
-        print("密码错误，请再次输入")
-        print("你还有"+str(i)+"次等入机会")
-        if i==0:
-            print("密码错误，登入失败,请来我司")
-            exit
-print("欢迎来到贝尔编程!")
-
-