human
I wrote the below code

    from datadog import initialize, statsd
    conf = config[DOMAIN]
    host = conf.get(CONF_HOST)
    port = conf.get(CONF_PORT)
    sample_rate = conf.get(CONF_RATE)
    prefix = conf.get(CONF_PREFIX)
    initialize(statsd_host=host, statsd_port=port)
    def logbook_entry_listener(event):
        'Listen    for    logbook    entries    and    send    them    as    events.'
        name = event.data.get('name')
        message = event.data.get('message')
        statsd.event(title='Home    Assistant', text='%%%    \n    **{}**    {}    \n    %%%'.format(name, message), tags=['entity:{}'.format(event.data.get('entity_id')), 'domain:{}'.format(event.data.get('domain'))])
        _LOGGER.debug('Sent    event    %s', event.data.get('entity_id'))
    def state_changed_listener(event):
        'Listen    for    new    messages    on    the    bus    and    sends    them    to    Datadog.'
        state = event.data.get('new_state')
        if ((state is None) or (state.state == STATE_UNKNOWN)):
            return
        if (state.attributes.get('hidden') is True):
            return
        states = dict(state.attributes)
        metric = '{}.{}'.format(prefix, state.domain)
        tags = ['entity:{}'.format(state.entity_id)]
        for (key, value) in states.items():
            if isinstance(value, (float, int)):
                attribute = '{}.{}'.format(metric, key.replace('    ', '_'))
                statsd.gauge(attribute, value, sample_rate=sample_rate, tags=tags)
                _LOGGER.debug('Sent    metric    %s:    %s    (tags:    %s)', attribute, value, tags)
        try:
            value = state_helper.state_as_number(state)
        except ValueError:
            _LOGGER.debug('Error    sending    %s:    %s    (tags:    %s)', metric, state.state, tags)
            return
        statsd.gauge(metric, value, sample_rate=sample_rate, tags=tags)
        _LOGGER.debug('Sent    metric    %s:    %s    (tags:    %s)', metric, value, tags)
    hass.bus.listen(EVENT_LOGBOOK_ENTRY,...

What's a good function header?
 What is a Python program to fix = conf?
assistant
#Here is Python program to fix = conf.

def setup(hass, config):