auto save

diy2.py

 username = "python"
 userpassword = "123456"
-w = 0
+i = 3
 while True:
-    w+=1    
-    if w==5:
+    if i>0:
+    i=i-1
         input ("滚")
-        break 
+        exit() 
     name = input("请输入用户名:")
     password = input("请输入密码:")
     if name == username and password == userpassword: