bubble_sort.py

  
def bubble_sort(arr):
  for i, val in enumerate(arr, len(arr):
    for j, pal in enumerate(arr, len(arr[:-1]):
      neighbor = arr[j + 1]
              if pal > neighbor:
                  arr[j+1] = arr[j] # swap
                  arr[j] = neighbor # swap
  return arr