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! While you're at it, check out some resources Treehouse students have shared here.

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 Basics (2015) Number Game App Number Game Refinement

Michael Nock
seal-mask
.a{fill-rule:evenodd;}techdegree seal-36
Michael Nock
Android Development Techdegree Graduate 16,018 Points
Posted by Michael Nock
.a{fill-rule:evenodd;}techdegree seal-36
Michael Nock
Android Development Techdegree Graduate 16,018 Points

Reason for putting "guesses.append(guess)" at the end.

In the video Kenneth mentions that we have to put it at the end of the While loop, after we check if a player has guessed correctly or not. However, the while loop condition is only checked once it's reached the end of the loop, so it really shouldn't matter where you put the append. Even if you put it first it'll run through the rest of the code. Having to interrupt the code to evaluate "len(guesses) < 5" after every single instruction would be much more processor intensive ;)

1 Answer

Chris Freeman
MOD
Chris Freeman
Treehouse Moderator 68,454 Points
Chris Freeman
Chris Freeman
Treehouse Moderator 68,454 Points

You are correct in that there is some leeway in where the append can be placed. Anywhere within the else block of the try statement works. This makes sure the guess was valid before appending it.

Not sure about your "evaluate... after every single instruction" comment. The while condition is only evaluated once before the start of each loop.

Michael Nock
seal-mask
.a{fill-rule:evenodd;}techdegree seal-36
Michael Nock
Android Development Techdegree Graduate 16,018 Points
Michael Nock
.a{fill-rule:evenodd;}techdegree seal-36
Michael Nock
Android Development Techdegree Graduate 16,018 Points

Not sure about your "evaluate... after every single instruction" comment. The while condition is only evaluated once before the start of each loop.

That's what i was saying, that there's no listener or anything attached looking for changes to the guesses list, it only evaluates the condition once per loop (at the start). :)