old_contents: from __future__ import unicode_literals
  
  import os
  
  from mopidy import config, exceptions, ext
  
  
  __version__ = '1.4.0'
  
  
  class Extension(ext.Extension):
  
      dist_name = 'Mopidy-MPRIS'
      ext_name = 'mpris'
      version = __version__
  
      def get_default_config(self):
          conf_file = os.path.join(os.path.dirname(__file__), 'ext.conf')
          return config.read(conf_file)
  
      def get_config_schema(self):
          schema = super(Extension, self).get_config_schema()
          schema['desktop_file'] = config.Path()
          schema['bus_type'] = config.String(choices=['session', 'system'])
          return schema
  
      def validate_environment(self):
          try:
              import dbus  # noqa
          except ImportError as e:
              raise exceptions.ExtensionError('dbus library not found', e)
  
      def setup(self, registry):
          from .frontend import MprisFrontend
          registry.add('frontend', MprisFrontend)
  
new_contents: from __future__ import unicode_literals
  
  import os
  
  from mopidy import config, exceptions, ext
  
  
  __version__ = '1.4.0'
  
  
  class Extension(ext.Extension):
  
      dist_name = 'Mopidy-MPRIS'
      ext_name = 'mpris'
      version = __version__
  
      def get_default_config(self):
          conf_file = os.path.join(os.path.dirname(__file__), 'ext.conf')
          return config.read(conf_file)
  
      def get_config_schema(self):
          schema = super(Extension, self).get_config_schema()
          schema['desktop_file'] = config.Path()
          schema['bus_type'] = config.String(choices=['session', 'system'])
          return schema
  
      def validate_environment(self):
          try:
              import pydbus  # noqa
          except ImportError as e:
              raise exceptions.ExtensionError('pydbus library not found', e)
  
      def setup(self, registry):
          from .frontend import MprisFrontend
          registry.add('frontend', MprisFrontend)
  
subject: Test for pydbus instead of dbus on startup