Oops, try again. list_extender([1, 2, 3, 4]) returned None, did you remember to return the result?
My question isn't of high importants but is more curiousity than anything, For this excerise I expected this code to work:
Can someone please explain why return lst.append(9) did not work; I thought it would be less code stating it all in one line.
n = [3, 5, 7] # Add your function here def list_extender(lst): return lst.append(9) print list_extender(n)