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Python Functional Python Functional Workhorses Map

Mesrop Janoyan
Mesrop Janoyan
10,165 Points
Posted by Mesrop Janoyan
Mesrop Janoyan
10,165 Points

Why doesn't my code work on Treehouse Challenges, but works as intended in my terminal running python3?

I ran the code "return [thing[::-1] for thing in things]" in my terminal and it returned what I expected. Meanwhile, I get "Bummer! reverse didn't accept an argument" when I use the same code in Treehouse.

maps.py 
backwards = [
    'tac',
    'esuoheerT',
    'htenneK',
    [5, 4, 3, 2, 1],
]

def reverse(things):
    return [thing[::-1] for thing in things]

1 Answer

Chris Freeman
MOD
Chris Freeman
Treehouse Moderator 68,441 Points
Chris Freeman
Chris Freeman
Treehouse Moderator 68,441 Points

You are doing more than the challenge requests. It only wish to reverse the iterable passed as a parameter, not reverse each element in the iterable. This is sufficient for Task 1:

backwards = [
    'tac',
    'esuoheerT',
    'htenneK',
    [5, 4, 3, 2, 1],
]

def reverse(things):
    return things[::-1]
Mesrop Janoyan
Mesrop Janoyan
10,165 Points
Mesrop Janoyan
Mesrop Janoyan
10,165 Points

Yepp, that definitely fixed it. Thank you for such a quick reply!