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mamadou diene
Python Web Development Techdegree Student 1,971 PointsYou're on fire! Last one and it is, of course, the hardest. Make a function named reverse_evens that accepts a single i
i have been stuck in this challenge and don't seem to understand it
def first_4(treehouse):
return treehouse[0:4]
def first_and_last_4(treehouse):
return treehouse[0:4] + treehouse[-4:]
def odds(lovecoding):
return lovecoding[1::2]
def reverse_evens(lovecoding):
return lovecoding[-1:-10:-2]
5 Answers
Chris Freeman
Treehouse Moderator 68,441 PointsHint: sometimes you have to use two steps: Get the even indices, then reverse it.
Second Hint: you can stack slices (aka slice of a slice) to do this in one line.
Post back if you need more hints. Good luck!!
mamadou diene
Python Web Development Techdegree Student 1,971 Pointsi made more corrections here
def first_4(treehouse):
return treehouse[0:4]
def first_and_last_4(treehouse):
return treehouse[0:4] + treehouse[-4:]
def odds(lovecoding):
return lovecoding[1::2]
def reverse_evens(lovecoding):
evens = lovecoding[2,4,6,8]
return evens[-1::-1]
[MOD: added ```python formatting -cf]
Nik Omel
Python Web Development Techdegree Student 7,496 PointsI have some issue:
def reverse_evens(items):
return items[::-2]
I tried in console with our example and I got the right result. here is my code -- >
items = [1, 2, 3, 4, 5]
def reverse_evens(items):
return items[::-2]
print(reverse_evens(items))
[5, 3, 1]
please help
Chris Freeman
Treehouse Moderator 68,441 PointsIf you try reverse_evens([1, 2, 3, 4, 5, 6]) you will not get the correct answer. Use two steps: get evens, then reverse them
mamadou diene
Python Web Development Techdegree Student 1,971 Pointsi have created a list of even indexes, then i took that list and return it in reverse and still getting it wrong
def first_4(treehouse):
return treehouse[0:4]
def first_and_last_4(treehouse):
return treehouse[0:4] + treehouse[-4:]
def odds(lovecoding):
return lovecoding[1::2]
def reverse_evens(lovecoding):
even_index = lovecoding = [2, 4, 6, 8, 10]
return reverse_index[-1::-1]
[MOD: added ```python formatting -cf]
Chris Freeman
Treehouse Moderator 68,441 PointsGet evens using
evens = lovecoding[::2]
Then return the reverse: evens[::-1]
mamadou diene
Python Web Development Techdegree Student 1,971 Pointsi feel like a dummy.. Thank you it worked
mamadou diene
Python Web Development Techdegree Student 1,971 Pointsmamadou diene
Python Web Development Techdegree Student 1,971 Pointsthank u for your pointer: i m still not passing. Here is what i've done
Chris Freeman
Treehouse Moderator 68,441 PointsChris Freeman
Treehouse Moderator 68,441 PointsAnother hint: create evens similarly to how odds were created using [::2] then reverse this result.