def get_notebook_path():
    """
    Return the full path of the jupyter notebook.
    """
    kernel_id = re.search('kernel-(.*).json',
                          ipykernel.connect.get_connection_file()).group(1)
    servers = list_running_servers()
    for ss in servers:
        response = requests.get(urljoin(ss['url'], 'api/sessions'),
                                params={'token': ss.get('token', '')})
        for nn in json.loads(response.text):
            if nn['kernel']['id'] == kernel_id:
                relative_path = nn['notebook']['path']
                return os.path.join(ss['notebook_dir'], relative_path)