In [2]:

    # Widget related imports
    from IPython.html import widgets
    from IPython.display import display, clear_output, Javascript
    from IPython.utils.traitlets import Unicode

    # nbconvert related imports
    from IPython.nbconvert import get_export_names, export_by_name
    from IPython.nbconvert.writers import FilesWriter
    from IPython.nbformat import current
    from IPython.nbconvert.utils.exceptions import ConversionException

Create a text Widget without displaying it. The widget will be used to store the notebook's name which is otherwise only available in the front-end.

In [3]:

    notebook_name = widgets.TextWidget()

    WARNING: "TextWidget" is deprecated, please use "Text" instead.

Get the current notebook's name by pushing JavaScript to the browser that sets the notebook name in a string widget.

In [3]:

    js = """var model = IPython.notebook.kernel.widget_manager.get_model('{model_id}');
    model.set('value', IPython.notebook.notebook_name);
    model.save();""".format(model_id=notebook_name.model_id)
    display(Javascript(data=js))

In [4]:

    filename = notebook_name.value
    filename

Out[4]:

    u'Export As (nbconvert).ipynb'

Create the widget that will allow the user to Export the current notebook.

In [5]:

    exporter_names = widgets.DropdownWidget(values=get_export_names(), value='html')
    export_button = widgets.ButtonWidget(description="Export")
    download_link = widgets.HTMLWidget(visible=False)

Export the notebook when the export button is clicked.

In [6]:

    file_writer = FilesWriter()

    def export(name, nb):

        # Get a unique key for the notebook and set it in the resources object.
        notebook_name = name[:name.rfind('.')]
        resources = {}
        resources['unique_key'] = notebook_name
        resources['output_files_dir'] = '%s_files' % notebook_name

        # Try to export
        try:
            output, resources = export_by_name(exporter_names.value, nb)
        except ConversionException as e:
            download_link.value = "<br>Could not export notebook!"
        else:
            write_results = file_writer.write(output, resources, notebook_name=notebook_name)

            download_link.value = "<br>Results: <a href='files/{filename}'><i>\"{filename}\"</i></a>".format(filename=write_results)
            download_link.visible = True

    def handle_export(widget):
        with open(filename, 'r') as f:
            export(filename, current.read(f, 'json'))
    export_button.on_click(handle_export)

Display the controls.

In [7]:

    display(exporter_names, export_button, download_link)