Get the middle element. If it's an even number of elements, average the middle two values.

middle_element.py

#Write your function here

def middle_element(lst):
  if len(lst) % 2 == 0:
    sum = lst[int(len(lst)/2)] + lst[int(len(lst) / 2) - 1]
    return sum / 2
  else:
    return lst[int(len(lst)/2)]      

#Uncomment the line below when your function is done
print(middle_element([5, 2, -10, -4, 4, 5]))
print(middle_element([5, 2, -4, 4, 5]))

This one doesn't work because the middle element of an odd count is not an integer.