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Brandon White
Full Stack JavaScript Techdegree Graduate 35,771 PointsMy Code Works in the REPL, but the output from the challenge is Bummer: reverse didn't accept an argument
backwards = [
'tac',
'esuoheerT',
'htenneK',
[5, 4, 3, 2, 1],
]
def reverse(iterable):
def switch(item):
return item[::-1]
return list(map(switch, iterable))
treehouse:~/workspace$ python
Python 3.9.0 (default, Jan 21 2021, 00:46:14)
[GCC 5.4.0 20160609] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> backwards = [
... 'tac',
... 'esuoheerT',
... 'htenneK',
... [5, 4, 3, 2, 1],
... ]
>>>
>>> def reverse(iterable):
... def switch(item):
... return item[::-1]
... return list(map(switch, iterable))
...
>>> frontwards = reverse(backwards)
>>> frontwards
['cat', 'Treehouse', 'Kenneth', [1, 2, 3, 4, 5]]
>>>
When I test my code in the REPL, I get a list with the iterable reversed. If I understood the reasoning behind the error I think I could probably figure it out on my own. But I don't get why my function wouldn't be accepting an argument.
Any help would be mightily appreciated.
I thought maybe the issue was the challenge didn't like me nesting a function in reverse, so I tried the following, but I got the same error:
backwards = [
'tac',
'esuoheerT',
'htenneK',
[5, 4, 3, 2, 1],
]
def reverse(iterable):
return [item[::-1] for item in iterable]
1 Answer
Brandon White
Full Stack JavaScript Techdegree Graduate 35,771 PointsPlease disregard. I misunderstood what the challenge was asking.
The following passed the first part of the challenge:
def reverse(item):
return item[::-1]
>>> def reverse(item):
... return item[::-1]
...
>>> frontwards = reverse(backwards)
>>> frontwards
[[5, 4, 3, 2, 1], 'htenneK', 'esuoheerT', 'tac']