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Dhruv Ghulati
1,582 PointsUnsure about how to return multiple things (first 4 and last 4) in a function
Unsure of how to do this. What have I done wrong with my code?
last_4 I have put as [len(i):len(i)-4:-1] - backwards counting, starting from the highest instead of lowest (as shown in video).
def first_4(i):
return i[:4]
def odds(i):
return i[1::2]
def first_and_last_4(i):
list=list[]
first_4=i[:4]
last_4=i[len(i):(len(i)-4):-1]
list.append(first_4)
list.append(last_4)
return list()
2 Answers
Kenneth Love
Treehouse Guest Teacherlist=list[] doesn't make any sense. I'm surprised it's not throwing a syntax error for you (or maybe it is).
You know how to get the first four items and you should know how to get the last four items. Slices work like lists, so they can be added together. Return the concatenation of the two slices.
Stephen Link
3,685 PointsKenneth is correct about list = list[]. I tried that in the interpreter and immediately received an error. Rename that list as something other than a Python keyword. Also, go back and review slices and then take another look at how you're trying to get the last 4 items. Finally, are you submitting all 3 functions to the grader? If so that is going to be another source of trouble for you. You have a function named first_4 and then your first_and_last_4 function has a variable named first_4.
Kenneth Love
Treehouse Guest TeacherThe first_4 variable inside the function actually won't matter. Python's scope rules keep those from conflicting.