text: """Markdown Exporter class"""
  
  # Copyright (c) Jupyter Development Team.
  # Distributed under the terms of the Modified BSD License.
  
  from traitlets import default
  from traitlets.config import Config
  
  from .templateexporter import TemplateExporter
  
  
  class MarkdownExporter(TemplateExporter):
      """
      Exports to a markdown document (.md)
      """
  
      @default('file_extension')
      def _file_extension_default(self):
          return '.md'
  
      @default('template_file')
      def _template_file_default(self):
          return 'markdown'
  
      output_mimetype = 'text/markdown'
  
      @default('raw_mimetypes')
      def _raw_mimetypes_default(self):
          return ['text/markdown', 'text/html', '']
  
      @property
      def default_config(self):
          c = Config({
              'ExtractOutputPreprocessor': {'enabled': True},
              'NbConvertBase': {
                  'display_data_priority': ['text/html',
                                            'text/markdown',
                                            'image/svg+xml',
                                            'text/latex',
                                            'image/png',
                                            'image/jpeg',
                                            'text/plain'
                                            ]
              },
  
          })
          c.merge(super(MarkdownExporter, self).default_config)
          return c
  