save project

diy2.py

 n = "python"
 n = "python"
 u = "123456"
 u = "123456"
-while True:
+i = 3
+while i > 0:
     n1 = input("请输入账号:")
     n1 = input("请输入账号:")
     u1 = input("请输入密码:")
     u1 = input("请输入密码:")
     if n1 == n and u1 == u:
     if n1 == n and u1 == u:
-        print("登录成功!")
         break
         break
     elif  n1 == n and u1 != u:
     elif  n1 == n and u1 != u:
         pass
         pass
     elif n1 != n and u1 == u:
     elif n1 != n and u1 == u:
-            print("账号错误!")
+        print("账号错误!")
     elif n1 != n and u1 != u:
     elif n1 != n and u1 != u:
-            print("账号错误!")
-                                   
+        print("账号错误!")
+    i = i-1 
+if i==0:
+    print("您的账号已被封锁!")
+if i > 0:
+    print("欢迎登录系统!")