old_contents: def sort(arr, length):
  	if length == 1:
  		return
  	return (arr, length)
  
  if __name__ == '__main__':
  	unsorted = list(reversed(range(1000)))
  	initial_len = len(unsorted)
  	print sort(unsorted, initial_len)
new_contents: def sort(arr, length):
  	
  	if length == 1:
  		return
  
  	pivot = choose_pivot(arr, length)
  
  	return (arr, length, pivot)
  
  
  def choose_pivot(arr, length):
  
  	return arr[0]
  
  
  if __name__ == '__main__':
  	
  	unsorted = list(reversed(range(1000)))
  	initial_len = len(unsorted)
  	
  	print sort(unsorted, initial_len)
subject: Add choose_pivot function (naive)