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Python Python Collections (Retired) Slices Slice Functions

Posted by Halcyon Abraham Ramirez
Halcyon Abraham Ramirez
846 Points

Python Collection Challenge task 3 Wow what is the solution to this task? I cannot solve it for the life of me

How exactly do you make the iterable return both the first 4 letter and last 4 letters?

slices.py 
def first_4(x):
  for i in x:
    return x[:4]

def odds(y):
  for i in y:
    return y[1::2]

def first_and_last_4 (z):
  for i in z:
    return z[:4] and z[-4:]

1 Answer

Jason Anello
Jason Anello
Courses Plus Student 94,610 Points

Hi Halcyon,

You don't need a for loop in any of the tasks. You only need to return a slice of the iterable that was passed in. Your for loop isn't really doing anything because on the first loop you're immediately returning from the function.

For the 3rd task it wants you to return an iterable that contains both the first 4 and last 4.

The two slices can be added together to form a new iterable.

Halcyon Abraham Ramirez
Halcyon Abraham Ramirez
846 Points

whaa? so I've been doing wrong? bummer. I thought for sure it needed a for loop because it said "iterable" but thank you very much for the heads up

Jason Anello
Jason Anello
Courses Plus Student 94,610 Points

Well an iterable is being passed in but you do not have to iterate over that iterable. The tasks are only asking you to return slices of that iterable.

Halcyon Abraham Ramirez
Halcyon Abraham Ramirez
846 Points

thank you I've managed to solve it when you hinted me at "added" thank you very much

Jason Anello
Jason Anello
Courses Plus Student 94,610 Points

You're welcome. Glad you figured it out.