I posted over in your other thread about wget not working. The reason you cannot import graphing is because if you don’t somehow retrieve the script and have it listed among the files in your current working directory (or installed a package called ‘graphing’ in your environment as @sgibson91 was suggesting – although is not the case here because there is a specific script file graphing.py that was supposed to be obtained), then running the import graphing command is going to fail with the Module not found error you see.
All that is to say though what I stress in the other thread where you seemed more onto the underlying issue. You have to FIRST get the file graphing.py into the working directory of where you are working on this notebook. Steps that are downstream that thwn try to work with the graphing.py script file will fail because that Python script file isn’t present.