old_contents: # :coding: utf-8
  # :copyright: Copyright (c) 2013 Martin Pengelly-Phillips
  # :license: See LICENSE.txt.
  
  import subprocess
  import pickle
  import base64
  
  try:
      from shlex import quote
  except ImportError:
      from pipes import quote
  
  from .base import Processor
  from .. import pickle_support
  
  
  class BackgroundProcessor(Processor):
      '''Local background processor.'''
      
      def process(self, command, args=None, kw=None):
          '''Process *command* with *args* and *kw*.'''
          if args is None:
              args = ()
          
          if kw is None:
              kw = {}
          
          serialised = base64.b64encode(
              pickle.dumps(
                  {'command': command, 'args': args, 'kw': kw},
                  pickle.HIGHEST_PROTOCOL
              )
          )
          
          python_statement = (
              'import pickle;'
              'import base64;'
              'data = base64.b64decode(\'{0}\');'
              'data = pickle.loads(data);'
              'data[\'command\'](*data[\'args\'], **data[\'kw\'])'
          ).format(serialised.replace("'", r"\'"))
  
          command = ' '.join(['python', '-c', '"{0}"'.format(python_statement)])
          print command
          print ''
          process = subprocess.Popen(command)
          return 'Background process started: {0}'.format(process.pid)
  
  
new_contents: # :coding: utf-8
  # :copyright: Copyright (c) 2013 Martin Pengelly-Phillips
  # :license: See LICENSE.txt.
  
  import subprocess
  import pickle
  import base64
  
  try:
      from shlex import quote
  except ImportError:
      from pipes import quote
  
  from .base import Processor
  from .. import pickle_support
  
  
  class BackgroundProcessor(Processor):
      '''Local background processor.'''
      
      def process(self, command, args=None, kw=None):
          '''Process *command* with *args* and *kw*.'''
          if args is None:
              args = ()
          
          if kw is None:
              kw = {}
          
          serialised = base64.b64encode(
              pickle.dumps(
                  {'command': command, 'args': args, 'kw': kw},
                  pickle.HIGHEST_PROTOCOL
              )
          )
          
          python_statement = (
              'import pickle;'
              'import base64;'
              'data = base64.b64decode(\'{0}\');'
              'data = pickle.loads(data);'
              'data[\'command\'](*data[\'args\'], **data[\'kw\'])'
          ).format(serialised.replace("'", r"\'"))
          
          command = ' '.join(['python', '-c', '"{0}"'.format(python_statement)])
          
          process = subprocess.Popen(command)
          return 'Background process started: {0}'.format(process.pid)
  
  
subject: Remove debug print statements.