def utc_to_local(utc_dt):
    """
    :param utc_dt: datetime in UTC
    :return: datetime in the local timezone
    """
    # get integer timestamp to avoid precision lost
    timestamp = calendar.timegm(utc_dt.timetuple())
    local_dt = datetime.datetime.fromtimestamp(timestamp)
    assert utc_dt.resolution >= datetime.timedelta(microseconds=1)
    return local_dt.replace(microsecond=utc_dt.microsecond)

    :param utc_dt: datetime in UTC
    :return: datetime in the local timezone
    
src/collectors/elb/elb.py