auto save

diy2.py

+username ="python"
+userpassword ="123456"
+k=3
+while ture:
+   if k>0 
+    name = input("请输入用户名:")
+    password=input("请输入密码:")
+    k-=1
+    if name!=username
+            print("用户名错误，请重新输入!")
+            print("你还有"+str(k)+"次机会")
+            continue
+        if password！=userpassword:
+            print("密码错误，请重新输入!")
+            continue
+        if name == username and password == userpas
+            print("登陆成功！")
+            break
+    else:
+        print("用户已锁定")
+        exit()
+    print("欢迎来到贝尔编程！")
\ No newline at end of file