auto save

diy1.py

+i = 3
 username = "宋"      
 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
-    if name != username:
-        print("用户名不存在")
-        continue
-    if password != userpassword:
-        print("密码输入有误")
+    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
+        if name != username:
+            print("用户名不存在")
+            continue
+        if password != userpassword:
+            print("密码输入有误") 
+    else:
+         print("你的账号已被锁定")
+         exit()
 print("欢迎来到贝尔编程")
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