Returns ``datetime.datetime`` from natural language time deltas

    >>> parse_human_datetime('now') <= datetime.now()
    True

def parse_human_timedelta(s: str):
    """
    Returns ``datetime.datetime`` from natural language time deltas

    >>> parse_human_datetime('now') <= datetime.now()
    True
    """
    cal = parsedatetime.Calendar()
    dttm = dttm_from_timtuple(datetime.now().timetuple())
    d = cal.parse(s or '', dttm)[0]
    d = datetime(d.tm_year, d.tm_mon, d.tm_mday, d.tm_hour, d.tm_min, d.tm_sec)
    return d - dttm