Welcome to the Treehouse Community

Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community!

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.

Start your free trial

Python Python Testing First Steps With Testing Writing and Running Doctests

Error in the video

I'm not sure if it's easy for you to redo the video, or if it's worth doing, but in the doctest for get_moves, Kenneth sets the location as "the lower right corner", (0, 2), and sees that the possible moves are right, up, and down. But since the array is zero-indexed and the dimensions are 2x2, the point (0,2) is actually outside the grid, which is why it says that he can move down. If he'd correctly set the lower right to (0, 1), he would have gotten right and up as the only possible moves.

Greg Kaleka
Greg Kaleka
39,021 Points

Great point. The right test should be:

>>> get_moves((0,1))                                                                                           
['RIGHT', 'UP']