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Ryan Valentine
Courses Plus Student 1,501 PointsSlice syntax seems like the only good way to solve.
I tried so many other ways and these are my 2 solutions. Are there any others are in between the complexity of these? I do not think checking the instance type is really ideal, but maybe it is because its necessary in this case. Was thinking maybe a try... catch instead but didn't attempt
def reverse(item):
item = copy(item)
if isinstance(item, str):
reversed_lst = list(reversed(item))
return ''.join(reversed_lst)
elif isinstance(item, list):
return list(reversed(item))
else:
print(f'{item} is not a string or list')
return item
Using slice syntax
def reverse(itr):
item = copy(itr)
return item[::-1]
2 Answers
Steven Parker
231,268 PointsThe first solution only works with strings and lists, so it's likely not being accepted because there are several other possible types of iterables.
The second solution is perhaps the ideal approach, as it will work with any kind of iterable without concern for type. But you don't need to bother making a copy since the slice does that for you:
def reverse(item):
return item[::-1]
Chris Freeman
Treehouse Moderator 68,441 PointsHey Ryan Valentine, It looks like the first solution has a NameError: name 'copy' is not defined.
If you add from copy import copy, the code will pass Task 1.
Steven Parker
231,268 PointsIt might pass, but it still wouldn't meet the objectives.
Chris Freeman
Treehouse Moderator 68,441 PointsIf the objective is create a function that can be used with map in Task 2, then this function works there as well 🤷♂️
Ryan Valentine
Courses Plus Student 1,501 PointsRyan Valentine
Courses Plus Student 1,501 PointsAlso, the first solution above was not accepted as correct even though it does work.