old_contents: def median(numbers):
      """Return the median of a list of numbers."""
      length = len(numbers)
      numbers.sort()
      
      if length % 2 == 0:
          place = length / 2
          calculated_median = (numbers[place] + numbers[place - 1]) / 2.0
      else:
          place = (length - 1) / 2
          calculated_median = numbers[place]
      return calculated_median
  
new_contents: def median(numbers):
      """Return the median of a list of numbers."""
      length = len(numbers)
      numbers.sort()
      
      if length % 2 == 0:
          place = int(length / 2) # index must be integer
          calculated_median = (numbers[place] + numbers[place - 1]) / 2.0
      else:
          place = int((length - 1) / 2) # index must be integer
          calculated_median = numbers[place]
      return calculated_median
  
subject: Convert place to integer, for list index