auto save

diy2.py

+i = 3
 username = "python"
 username = "python"
 userpassword = "123456"
 userpassword = "123456"
-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("用户名输入错误")
-    else:
-        print("密码输入错误")
+        while True:
+            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("用户名输入错误")
+            else:
+                print("密码输入错误")
 print("欢迎来到贝尔编程!")
 print("欢迎来到贝尔编程!")