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Python Functional Python Functional Workhorses Map

Benjamin Cha
Benjamin Cha
2,509 Points

How to use the forwards function?

I can't fix the forwards function, even though I know how to do it backwards. How do I do this? Can somebody help me?


backwards = [
    [5, 4, 3, 2, 1],

def reverse(iterableitem):
    revitem = [] 
    for item in iterableitem[::-1]:

    return revitem

forwards = map(reverse, backwards)

1 Answer

Rohald van Merode
.a{fill-rule:evenodd;}techdegree seal-36
Rohald van Merode
Treehouse Staff

Hey Benjamin Cha πŸ‘‹

You're very close here! Currently, your reverse function always returns a list, even when the provided value was a string. To fix this you can simply return your iterableitem[::-1]. This will reverse the provided value and return the same type of value as provided initially πŸ™‚

def reverse(thing):
    return thing[::-1]

forwards = map(reverse, backwards)

Hope this helps!