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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def screenshot( width=None, height=None, format="png", fig=None, timeout_seconds=10, output_widget=None, headless=False, devmode=False, ):
 """Save the figure to a PIL.Image object. :param int width: the width of the image in pixels :param int height: the height of the image in pixels :param format: format of output data (png, jpeg or svg) :type fig: ipyvolume.widgets.Figure or None :param fig: if None use the current figure :type timeout_seconds: int :param timeout_seconds: maximum time to wait for image data to return :type output_widget: ipywidgets.Output :param output_widget: a widget to use as a context manager for capturing the data :param bool headless: if True, use headless chrome to take screenshot :param bool devmode: if True, attempt to get index.js from local js/dist folder :return: PIL.Image """

    assert format in ['png', 'jpeg', 'svg'], "image format must be png, jpeg or svg"
    data = _screenshot_data(
        timeout_seconds=timeout_seconds,
        output_widget=output_widget,
        format=format,
        width=width,
        height=height,
        fig=fig,
        headless=headless,
        devmode=devmode,
    )
    f = StringIO(data)
    return PIL.Image.open(f)