def str_date(date):
    """
    convert the datetime.date into string
    :param date: <class 'datetime.date'>, 2016-06-10 02:03:46.788409+10:00
    :return 20160603
    """
    d = str(date).split('-')
    string_date = ""
    for i in range(len(d)):
        string_date += d[i]
    return string_date