[Tutor] Problem solving

[Sibylle Koczian]

Am 15.11.2020 um 13:15 schrieb Robin Williamson via Tutor:
> if b "or" v<r
>      print("rouge"):
> elif v"or"r<b
>      print("bleu")
> else:
>      print("vert")I am trying to write a program that will tell me what the dominant colour is in a photo, either green, red or blue.I have tried to write the above program but it seems I have'nt understood something.Any help and explanations would be greatly appreciated.ThanksRobinYou may have noticed that I'm using rouge for red, vert for green, and bleu for blue, I'm in France!
>

In addition to Alan Gauld's answer: I think Python may interpret your
conditions not like you meant them - but perhaps I've misunderstood the
meaning of your variables b, r, v. Those names aren't good.

I read your variables like this:

b: quantity of blue in the photo
r: quantity of red
v: quantity of green (v for vert)

And I guess that your first condition should tell Python:

If there is less blue or green than red in the photo, then print
"rouge". Or, nearer to logic and programming: if there is less blue than
red *and* less green than red, then print "rouge".

But if you change your string "or" to the keyword or, then Python reads
it like this:

if b or (v < r)

which means: if there is any blue at all in the photo, then print
"rouge"; if there is less green than red, then print "rouge".

So I suppose your first condition should be

if b < r and v < r:
	print("rouge")

HTH
Sibylle