Get current numeric timezone offset from UTC (i.e. -0700)

    Returns:
        str: Offset from UTC

    CLI Example:

    .. code-block:: bash

        salt '*' timezone.get_offset

def get_offset():
    '''
    Get current numeric timezone offset from UTC (i.e. -0700)

    Returns:
        str: Offset from UTC

    CLI Example:

    .. code-block:: bash

        salt '*' timezone.get_offset
    '''
    # http://craigglennie.com/programming/python/2013/07/21/working-with-timezones-using-Python-and-pytz-localize-vs-normalize/
    tz_object = pytz.timezone(get_zone())
    utc_time = pytz.utc.localize(datetime.utcnow())
    loc_time = utc_time.astimezone(tz_object)
    norm_time = tz_object.normalize(loc_time)
    return norm_time.strftime('%z')