def _no_data_found():
    """
    Print a message that no data could be found on the page.

    Occasionally, such as right before the beginning of a season, a page will
    return a valid response but will have no data outside of the default
    HTML and CSS template. With no data present on the page, sportsreference
    can't parse any information and should indicate the lack of data and return
    safely.
    """
    print(
        'The requested page returned a valid response, but no data could be found. Has the season begun, and is the data available on www.sports-reference.com?'
        )
    return
