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Python Functional Python Functional Workhorses Map

Andy McDonald
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Andy McDonald
Python Development Techdegree Graduate 13,801 Points
Posted by Andy McDonald
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Andy McDonald
Python Development Techdegree Graduate 13,801 Points

Function "not accepting argument"

Here's my code, I run it in another program and it seems to accept arguments just fine but when I run it in the Treehouse test it wont let me pass. Says 'reverse did not accept an argument'. Any ideas on why its saying this?

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

def reverse(var):
    newnie = list(var)
    awords = []
    for i in range(len(newnie), 0, -1):
        awords.append(newnie[(i-1)])
    awords = "".join(awords)
    return awords

1 Answer

Steven Parker
Steven Parker
231,248 Points
Steven Parker
Steven Parker
231,248 Points

Perhaps you haven't tested this using all of the sample data. In particular, try it with the numeric list (reverse([5,4,3,2,1])) and see how your code performs with that.

Hint: there's a much easier way to implement this. Are you familiar with slices?

Andy McDonald
seal-mask
.a{fill-rule:evenodd;}techdegree seal-36
Andy McDonald
Python Development Techdegree Graduate 13,801 Points
Andy McDonald
.a{fill-rule:evenodd;}techdegree seal-36
Andy McDonald
Python Development Techdegree Graduate 13,801 Points

I for sure once was. I tried refamiliarizing myself with slices but it I was having trouble slicing a string and just started going this route.

Steven Parker
Steven Parker
231,248 Points
Steven Parker
Steven Parker
231,248 Points

You can add more code to make this work with different kinds of iterables; but this might be a good time to review slices, since with that it becomes a one-liner.   :wink: