def timedelta_datetime_list(date_list, reverse=False, expanded_info=False):
    """
    Gives the difference between the date element and the next one.

    :param date_list: list of datetime/date objects
    :type date_list: list
    :param reverse: How the list should be sorted list.sort(reverse=<True,False>)
    :type reverse: bool
    :param expanded_info: Adds the first and second date on the yield as return parameters.
    :type expanded_info: bool
    :return: Yields the difference between the current date element and the next one.
    :return type: datetime.timedelta + Optional: *(datetime.datetime, datetime.datetime)
    """
    date_list.sort(reverse=reverse)
    date_init, i = date_list[0], 1
    while i < len(date_list):
        if expanded_info:
            yield date_list[i] - date_init, date_list[i], date_init
        else:
            yield date_list[i] - date_init
        date_init, i = date_list[i], i + 1

def xrange_date(date_start_obj, date_end_obj, timedelta_obj):
    """
    `xrange` adaptation for date and datetime objects.

    :param date_start_obj: date to start
    :type date_start_obj: datetime.date, datetime.datetime
    :param date_end_obj: date to end
    :type date_end_obj: datetime.date, datetime.datetime
    :param timedelta_obj: increment or decrement for iteration
    :type timedelta_obj: datetime.timedelta, dateutil.relativedelta.relativedelta
    :return: Yields elements while dt_start (</>) dt_end.
    :return type: datetime.date, datetime.datetime
    """
    if (getattr(timedelta_obj, 'total_seconds', False) and timedelta_obj.total_seconds() or timedelta_obj) >= 0:
        cp_modifier = type(date_start_obj).__le__
    else:
        cp_modifier = type(date_start_obj).__ge__
    while cp_modifier(date_start_obj, date_end_obj):
        yield date_start_obj
        date_start_obj = date_start_obj + timedelta_obj

def timedelta_to_hhmmss(tdelta, to_string=False):
    """
    Converts timedelta on hours, minutes and seconds.

    :param tdelta: datetime.timedelta object
    :param to_string: Parses response to text formatted with leading zeroes.
    :return: hours, minutes, seconds
    :rtype: int, int, int
    """
    hh, mm = divmod(abs(tdelta.total_seconds() / 60.0), 60.0)
    _, ss = divmod(abs(timedelta(minutes=mm).total_seconds()), 60.0)
    if to_string:
        return '%02i' % int(hh), '%02i' % int(mm), '%02i' % int(ss)
    return int(hh), int(mm), int(ss)