old_contents: def bubbleSort(arr):
      n = len(arr)
   
      # Traverse through all array elements
      for i in range(n):
   
          # Last i elements are already in place
          for j in range(0, n-i-1):
   
              # traverse the array from 0 to n-i-1
              # Swap if the element found is greater
              # than the next element
              if arr[j] > arr[j+1] :
                  arr[j], arr[j+1] = arr[j+1], arr[j]
   
  # Driver code to test above
  arr = [64, 34, 25, 12, 22, 11, 90]
   
  bubbleSort(arr)
   
  print ("Sorted array is:")
  for i in range(len(arr)):
      print ("%d" %arr[i]),
  
new_contents: from __future__ import print_function
  
  def bubble_sort(arr):
    n = len(arr)
    # Traverse through all array elements
    for i in range(n):
      # Last i elements are already in place
        for j in range(0, n-i-1):
          # traverse the array from 0 to n-i-1
          # Swap if the element found is greater
          # than the next element
          if arr[j] > arr[j+1] :
                arr[j], arr[j+1] = arr[j+1], arr[j]
    return arr
   
  if __name__ == '__main__':
      try:
          raw_input          # Python 2
      except NameError:
          raw_input = input  # Python 3
      user_input = raw_input('Enter numbers separated by a comma:').strip()
      unsorted = [int(item) for item in user_input.split(',')]
      print(*bubble_sort(unsorted), sep=',')
  
subject: Update bubble_sort.py