auto save

diy2.py

 username = "python"
 username = "python"
 userpassword = "123456"
 userpassword = "123456"
 while True:
 while True:
-    name = input("请输入用户名:")
-    password = input("请输入密码:")
-    if name == username and password == userpassword:
-        print("登录成功!")
-        break
-    elif name != username:
-        print("用户名不存在，请重新输入!")
-        continue
-    else:
-        print("密码输入错误，请重新输入!")
-print("欢迎来到贝尔编程!")
+    if i>0
+        name = input("请输入用户名:")
+        password = input("请输入密码:")
+        i-=1
+        if name == username and password == userpassword:
+            print("登录成功!")
+            break
+        elif name != username:
+            print("用户名不存在，请重新输入!")
+            continue
+        else:
\ No newline at end of file
+            print("密码输入错误，请重新输入!")
+    print("欢迎来到贝尔编程!")
\ No newline at end of file