old_contents: from __future__ import absolute_import, unicode_literals
  
  import sys
  import textwrap
  
  
  try:
      import gi
      gi.require_version('Gst', '1.0')
      gi.require_version('GstPbutils', '1.0')
      from gi.repository import GLib, GObject, Gst, GstPbutils
  except ImportError:
      print(textwrap.dedent("""
          ERROR: A GObject Python package was not found.
  
          Mopidy requires GStreamer to work. GStreamer is a C library with a
          number of dependencies itself, and cannot be installed with the regular
          Python tools like pip.
  
          Please see http://docs.mopidy.com/en/latest/installation/ for
          instructions on how to install the required dependencies.
      """))
      raise
  else:
      Gst.is_initialized() or Gst.init()
  
  
  REQUIRED_GST_VERSION = (1, 2)
  
  if Gst.version() < REQUIRED_GST_VERSION:
      sys.exit(
          'ERROR: Mopidy requires GStreamer >= %s, but found %s.' % (
              '.'.join(map(str, REQUIRED_GST_VERSION)), Gst.version_string()))
  
  
  __all__ = [
      'GLib',
      'GObject',
      'Gst',
      'GstPbutils',
      'gi',
  ]
  
new_contents: from __future__ import absolute_import, print_function, unicode_literals
  
  import sys
  import textwrap
  
  
  try:
      import gi
      gi.require_version('Gst', '1.0')
      gi.require_version('GstPbutils', '1.0')
      from gi.repository import GLib, GObject, Gst, GstPbutils
  except ImportError:
      print(textwrap.dedent("""
          ERROR: A GObject Python package was not found.
  
          Mopidy requires GStreamer to work. GStreamer is a C library with a
          number of dependencies itself, and cannot be installed with the regular
          Python tools like pip.
  
          Please see http://docs.mopidy.com/en/latest/installation/ for
          instructions on how to install the required dependencies.
      """))
      raise
  else:
      Gst.is_initialized() or Gst.init()
  
  
  REQUIRED_GST_VERSION = (1, 2)
  
  if Gst.version() < REQUIRED_GST_VERSION:
      sys.exit(
          'ERROR: Mopidy requires GStreamer >= %s, but found %s.' % (
              '.'.join(map(str, REQUIRED_GST_VERSION)), Gst.version_string()))
  
  
  __all__ = [
      'GLib',
      'GObject',
      'Gst',
      'GstPbutils',
      'gi',
  ]
  
subject: Add missing __future__ import