old_contents: import sys
  
  """Functions to support backwards compatibility.
  
  Basically where we have functions which differ between python 2 and 3, we provide implementations here
  and then Python-specific versions in backward2 and backward3.
  """
  
  if sys.hexversion >= 0x03000000:  # Python 3+
      from stomp.backward3 import *
  else:  # Python 2
      from stomp.backward2 import *
  
  
  def get_errno(e):
      """
      Return the errno of an exception, or the first argument if errno is not available.
  
      :param Exception e: the exception object
      """
      try:
          return e.errno
      except AttributeError:
          return e.args[0]
  
  
  try:
      from fractions import gcd
  except ImportError:
      def gcd(a, b):
          """Calculate the Greatest Common Divisor of a and b.
  
          Unless b==0, the result will have the same sign as b (so that when
          b is divided by it, the result comes out positive).
  
          (Copied from the Python2.6 source Copyright (c) 2001-2011 Python Software Foundation; All Rights Reserved)
          """
          while b:
              a, b = b, a % b
          return a
  
  
  try:
      from time import monotonic
  except ImportError:  # Python < 3.3/3.5
      from time import time as monotonic
  
new_contents: import sys
  
  """Functions to support backwards compatibility.
  
  Basically where we have functions which differ between python 2 and 3, we provide implementations here
  and then Python-specific versions in backward2 and backward3.
  """
  
  if sys.hexversion >= 0x03000000:  # Python 3+
      from stomp.backward3 import *
  else:  # Python 2
      from stomp.backward2 import *
  
  
  def get_errno(e):
      """
      Return the errno of an exception, or the first argument if errno is not available.
  
      :param Exception e: the exception object
      """
      try:
          return e.errno
      except AttributeError:
          return e.args[0]
  
  
  try:
      from time import monotonic
  except ImportError:  # Python < 3.3/3.5
      from time import time as monotonic
  
subject: Remove no longer needed backward.gcd