old_contents: from __future__ import unicode_literals
  
  import os
  
  from ..utils import (
      PostProcessingError,
      cli_configuration_args,
      encodeFilename,
  )
  
  
  class PostProcessor(object):
      """Post Processor class.
  
      PostProcessor objects can be added to downloaders with their
      add_post_processor() method. When the downloader has finished a
      successful download, it will take its internal chain of PostProcessors
      and start calling the run() method on each one of them, first with
      an initial argument and then with the returned value of the previous
      PostProcessor.
  
      The chain will be stopped if one of them ever returns None or the end
      of the chain is reached.
  
      PostProcessor objects follow a "mutual registration" process similar
      to InfoExtractor objects.
  
      Optionally PostProcessor can use a list of additional command-line arguments
      with self._configuration_args.
      """
  
      _downloader = None
  
      def __init__(self, downloader=None):
          self._downloader = downloader
  
      def set_downloader(self, downloader):
          """Sets the downloader for this PP."""
          self._downloader = downloader
  
      def run(self, information):
          """Run the PostProcessor.
  
          The "information" argument is a dictionary like the ones
          composed by InfoExtractors. The only difference is that this
          one has an extra field called "filepath" that points to the
          downloaded file.
  
          This method returns a tuple, the first element is a list of the files
          that can be deleted, and the second of which is the updated
          information.
  
          In addition, this method may raise a PostProcessingError
          exception if post processing fails.
          """
          return [], information  # by default, keep file and do nothing
  
      def try_utime(self, path, atime, mtime, errnote='Cannot update utime of file'):
          try:
              os.utime(encodeFilename(path), (atime, mtime))
          except Exception:
              self._downloader.report_warning(errnote)
  
      def _configuration_args(self, default=[]):
          return cli_configuration_args(self.params, 'postprocessor_args', default)
  
  
  class AudioConversionError(PostProcessingError):
      pass
  
new_contents: from __future__ import unicode_literals
  
  import os
  
  from ..utils import (
      PostProcessingError,
      cli_configuration_args,
      encodeFilename,
  )
  
  
  class PostProcessor(object):
      """Post Processor class.
  
      PostProcessor objects can be added to downloaders with their
      add_post_processor() method. When the downloader has finished a
      successful download, it will take its internal chain of PostProcessors
      and start calling the run() method on each one of them, first with
      an initial argument and then with the returned value of the previous
      PostProcessor.
  
      The chain will be stopped if one of them ever returns None or the end
      of the chain is reached.
  
      PostProcessor objects follow a "mutual registration" process similar
      to InfoExtractor objects.
  
      Optionally PostProcessor can use a list of additional command-line arguments
      with self._configuration_args.
      """
  
      _downloader = None
  
      def __init__(self, downloader=None):
          self._downloader = downloader
  
      def set_downloader(self, downloader):
          """Sets the downloader for this PP."""
          self._downloader = downloader
  
      def run(self, information):
          """Run the PostProcessor.
  
          The "information" argument is a dictionary like the ones
          composed by InfoExtractors. The only difference is that this
          one has an extra field called "filepath" that points to the
          downloaded file.
  
          This method returns a tuple, the first element is a list of the files
          that can be deleted, and the second of which is the updated
          information.
  
          In addition, this method may raise a PostProcessingError
          exception if post processing fails.
          """
          return [], information  # by default, keep file and do nothing
  
      def try_utime(self, path, atime, mtime, errnote='Cannot update utime of file'):
          try:
              os.utime(encodeFilename(path), (atime, mtime))
          except Exception:
              self._downloader.report_warning(errnote)
  
      def _configuration_args(self, default=[]):
          return cli_configuration_args(self._downloader.params, 'postprocessor_args', default)
  
  
  class AudioConversionError(PostProcessingError):
      pass
  
subject: Use 'self._downloader.params' instead of 'self.params'