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Carlos Villalta
Courses Plus Student 2,173 Pointsreturn iterable[-1::-2] is not working even though it is doing what is expected
def reverse_evens(iterable):
return iterable[-1::-2]
returns all even indexed items yet it is not being accepted as a valid answer
>>> iterable = [1, 2, 3, 4, 5]
>>> iterable[-1::-2]
[5, 3, 1]
>>>
def first_4(iterable):
return iterable[0:4]
def first_and_last_4(iterable):
return iterable[0:4] + iterable[-4:]
def odds(iterable):
return iterable[1::2]
def reverse_evens(iterable):
return iterable[-1::-2]
1 Answer
james south
Front End Web Development Techdegree Graduate 33,271 Pointsadd a sixth element to the iterable and see if you still get the right elements. you are slicing every other element, not necessarily the even indices. if the last element has an odd index, you will get only the odd indices. to fix you can slice evens first, then reverse, or you can test for length and remove the last element if needed then slice every other element from the end like you are.
Carlos Villalta
Courses Plus Student 2,173 PointsCarlos Villalta
Courses Plus Student 2,173 PointsAhhh, I see, you are right, thanks!