Completed lesson access to "elegant" solutions to learn best practices

I just completed Python --> Fun With Numbers --> 4. Digit Sum

My solution worked but I found a “better” solution in the Q&A Forum which had fewer lines of code – it was more efficient. I like to take a peak at the forums after I’ve worked out the solution to a lesson so I can see if there are different approaches I could have tried.

It would be nice to have a look at ways to solve a problem, accessible only after completing the lesson, so that we can see what the best practices are for handling different scenarios.