def default_config(self):
        c = Config({
            'NbConvertBase': {
                'display_data_priority' : ['application/vnd.jupyter.widget-state+json',
                                           'application/vnd.jupyter.widget-view+json',
                                           'application/javascript',
                                           'text/html',
                                           'text/markdown',
                                           'image/svg+xml',
                                           'text/latex',
                                           'image/png',
                                           'image/jpeg',
                                           'text/plain'
                                          ]
                },
            'CSSHTMLHeaderPreprocessor':{
                'enabled':True
                },
            'HighlightMagicsPreprocessor': {
                'enabled':True
                }
            })
        c.merge(super(HTMLExporter,self).default_config)
        return c