auto save

1.py

+i=3
+username = "py"
+userpassword = "123"
+while True:
+    if i=>0:
+       name = input("请输入用户名")
+       password = input("请输入密码")
+       i -= 1 
+    if username==name and userpassword==password:  
+        print("登录成功!")
+        break
+    elif name!=username:
+        print("用户名请重新输入")
+    else password!=userpassword:
+        print("账户密码错误")
+        exit()  
+print("欢迎!")          
\ No newline at end of file

diy2.py

@@ -2,11 +2,11 @@ i=3
 username = "python"
 username = "python"
 userpassword = "123456"
 userpassword = "123456"
 while True:
 while True:
-    if i>0:
+    
         name = input("请输入用户名:")
         name = input("请输入用户名:")
-        password = input("请输入密码:")
+       password = input("请输入密码:")
         i -= 1
         i -= 1
-        if name == username and password == userpassword:
+        
             print("登录成功!")
             print("登录成功!")
             break
             break
         elif name!=username:  
         elif name!=username: