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Guillaume Crt
6,395 Pointsneed clarification about return statement in check_win method
my question is about the check_win method :
{
def check_win(self):
for card in self.cards:
if card.matched == False:
return False
return True
}
if the return False appears then the rest of the code (return True) is not running and the loop is ending ?
I would have write :
{
def check_win(self):
check_win = True
for card in self.cards:
if not card.matched:
check_win = False
break
else:
continue
return check_win
}```
3 Answers
Peter Vann
36,425 PointsHi Guillaume!
I think both approaches achieve the same end (although I didn't test them), but I would have to argue the original code is succinct and difficult to improve.
The main point is that you want to loop through all the cards and as soon as you find a card, if any, that hasn't been matched, you return false immediately (because the game isn't won/finished yet). In other words, once one card has been identified as not matched, there's no point in checking the rest.
And yes, any time you return from a function, any remaining code in that function is bypassed.
I hope that helps.
Stay safe and happy coding!
Peter Vann
36,425 PointsHey Chris!
Useful input.
I certainly advocate using many recourses/every resource available, so thank you!
-Pete
Guillaume Crt
6,395 Pointsthanks a lot for those explanations !
Chris Freeman
Treehouse Moderator 68,423 PointsChris Freeman
Treehouse Moderator 68,423 PointsGuillaume Crt, if I may add a bit more....
You may have heard that there is a "Pythonic" way to code, though even in this, there are conflicting camps. Some believe a function should have a single return, others believe that multiple returns are ok. I say it depends on if the multiple returns add or detract from the solution.
In the second solution, it might be confusing to have a variable with the same name as the function. A suggestion here would be to use a name that connotes a winning state such as "win".
A
continueis never needed as the last statement in a block since the end of a block will always return to the top. With out the need for thecontinue, theelseis also no longer needed.Putting these together yields a solution as good as the multiple return version.
Kudos on using code block styling. In addition to css, you can use python (as I did above)!