A logging.basicConfig() wrapper that also undoes the default
    Bokeh-specific configuration.

def basicConfig(*args, **kwargs):
    """
    A logging.basicConfig() wrapper that also undoes the default
    Bokeh-specific configuration.
    """
    if default_handler is not None:
        bokeh_logger.removeHandler(default_handler)
        bokeh_logger.propagate = True
    return logging.basicConfig(*args, **kwargs)