I’m trying to figure out where I went wrong with this exercise:
The idea is that they want a function that will take the length of a list, and then append that number to the end of the list.
So if the list is [23, 42, 108], the list is 3 items long and so the function would append ‘3’ and you would end up with [23, 42, 108, 3].
The listed solution is:
def append_size(lst): lst.append(len(lst)) return lst print(append_size([23, 42, 108]))
My attempted solution was:
def append_size(lst): size = len(lst) lst.append(size) print(append_size([23, 42, 108]))
This returns a value of ‘None,’ and I’m not sure why. The function seems like it should be grabbing the length of the list (3) and saving it to the variable (size). Then - as I understand it - it should be appending ‘size’ (which is 3) to the end of the list. I highly suspect that the problem is that I’m not using ‘return,’ but I’m not sure. Thoughts?