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Python Python Collections (2016, retired 2019) Slices Slice Functions

Jaleel Rivera
Jaleel Rivera
1,338 Points
Posted by Jaleel Rivera
Jaleel Rivera
1,338 Points

As a single value

The questions asks for us to return the first and last 4 numbers of an iterable as a single value I am doing so but I continue to receive the wrong answer. What does the question mean by single value. Am I supposed to return those values in a single list or a single string ?

slices.py 
def first_4(val):
    return val[:4]


def first_and_last_4(x):
    #for loop through both lists and turn every input into a string 
    #try block that tests if a value or type error occurs 
    #once everything is string add them all together then return it 
    q = x[:4] + x[-1:-5:-1]
    b = ''
    for a in q:
        b += str(a)
    return b

1 Answer

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

It sounds like you have the right idea. You nearly have a solution when you assign your variable "q".

But the instructions don't say anything about changing the item order. Take the last 4 items without reversing them.

Jaleel Rivera
Jaleel Rivera
1,338 Points
Jaleel Rivera
Jaleel Rivera
1,338 Points

Thanks for the help I see what you mean I was taking the last 4 by indexing the list backwards.