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

Posted by Petko Delchev
Petko Delchev
Courses Plus Student 2,103 Points

Need little help please. first and last in list..

OK, this second one should be pretty similar to the first. Make a new function named first_and_last_4. It'll accept a single iterable but, this time, it'll return the first four and last four items as a single value.

slices.py 
def first_4(iterable):
    return iterable[0:4]


def first_and_last_4(iterable2):
    return iterable2[:4] and iterable2[-5:]
Afloarei Andrei
Afloarei Andrei
5,163 Points
Afloarei Andrei
Afloarei Andrei
5,163 Points

You are returning only the last 5 items. Try 'iterable2[-4:]' instead of 'iterable2[-5]', and put a ',' instead of 'and'.

1 Answer

Steven Parker
Steven Parker
231,269 Points
Steven Parker
Steven Parker
231,269 Points

It looks like you have two issues:

  • to join strings together, use "+" — "and" is for logical combining when you want a true/false result
  • a startintg value of -5 will give you last 5 characters instead of the last 4
Abubakar Gataev
Abubakar Gataev
2,226 Points

Hi I don't know for sure but I thought 'and' was for true/true

Steven Parker
Steven Parker
231,269 Points
Steven Parker
Steven Parker
231,269 Points

By "true/false" I meant boolean.