auto save

diy2.py

-username = "python"
-userpassword = "123456"
+username = "python"#注册账号
+userpassword = "123456"#注册密码
+i=3
 while True:
 while True:
-    name = input("请输入用户名:")
+    if i>0:
+        name = input("请输入用户名:")#账号
         password = input("请输入密码:")
         password = input("请输入密码:")
+        i-=1 #密码
         if name == username and password == userpassword:
         if name == username and password == userpassword:
             print("登录成功!")
             print("登录成功!")
             break
             break
-    print("用户名和密码错误!请重新输入")
+        if  username!=name:
+            print("账号错误请重新输入")
+            print("还剩下"+str(i)+"次")
+            continue
+        if userpassword!=password:
+            print("密码错误请重新输入")
+            print("还剩下"+str(i)+"次")
+    else：
+        print("账号已被锁定")
+        exit()
 print("欢迎来到贝尔编程!")
 print("欢迎来到贝尔编程!")
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