Why i am getting this error house_model not define i already define

Hello @Ahmad_Bilal1

Have you got any error when you run the code? If yes, share it here

If no error when you run the code and if you get error only when you submit the code for grading, then, try reloading your workspace.

Hello @Ahmad_Bilal1
Check the following post

i have try this but no working. if my code is running having output why i am not getting pass

Check your file name, avoid renaming files for the graded assignment. Follow the instructions carefully.