From fdeef2f707ec0f3609c52369a9f0b3a7d71411f3 Mon Sep 17 00:00:00 2001
From: Fabian Affolter <mail@fabian-affolter.ch>
Date: Fri, 25 Aug 2017 13:30:00 +0200
Subject: [PATCH] Use const (#9127)

* Use const

* Align quotes
---
 homeassistant/components/graphite.py   | 13 ++++++-------
 homeassistant/components/prometheus.py | 21 ++++++++++-----------
 2 files changed, 16 insertions(+), 18 deletions(-)

diff --git a/homeassistant/components/graphite.py b/homeassistant/components/graphite.py
index fc2a196c4c6..e4626d0f016 100644
--- a/homeassistant/components/graphite.py
+++ b/homeassistant/components/graphite.py
@@ -45,13 +45,12 @@ def setup(hass, config):
     try:
         sock.connect((host, port))
         sock.shutdown(2)
-        _LOGGER.debug('Connection to Graphite possible')
+        _LOGGER.debug("Connection to Graphite possible")
     except socket.error:
-        _LOGGER.error('Not able to connect to Graphite')
+        _LOGGER.error("Not able to connect to Graphite")
         return False
 
     GraphiteFeeder(hass, host, port, prefix)
-
     return True
 
 
@@ -143,15 +142,15 @@ class GraphiteFeeder(threading.Thread):
                 _LOGGER.debug("Processing STATE_CHANGED event for %s",
                               event.data['entity_id'])
                 try:
-                    self._report_attributes(event.data['entity_id'],
-                                            event.data['new_state'])
+                    self._report_attributes(
+                        event.data['entity_id'], event.data['new_state'])
                 # pylint: disable=broad-except
                 except Exception:
                     # Catch this so we can avoid the thread dying and
                     # make it visible.
                     _LOGGER.exception("Failed to process STATE_CHANGED event")
             else:
-                _LOGGER.warning("Processing unexpected event type %s",
-                                event.event_type)
+                _LOGGER.warning(
+                    "Processing unexpected event type %s", event.event_type)
 
             self._queue.task_done()
diff --git a/homeassistant/components/prometheus.py b/homeassistant/components/prometheus.py
index f244bcdd740..0396cafd4ff 100644
--- a/homeassistant/components/prometheus.py
+++ b/homeassistant/components/prometheus.py
@@ -12,16 +12,18 @@ from aiohttp import web
 
 from homeassistant.components.http import HomeAssistantView
 from homeassistant.components import recorder
-from homeassistant.const import (CONF_DOMAINS, CONF_ENTITIES, CONF_EXCLUDE,
-                                 CONF_INCLUDE, EVENT_STATE_CHANGED,
-                                 TEMP_CELSIUS, TEMP_FAHRENHEIT)
+from homeassistant.const import (
+    CONF_DOMAINS, CONF_ENTITIES, CONF_EXCLUDE, CONF_INCLUDE, TEMP_CELSIUS,
+    EVENT_STATE_CHANGED, TEMP_FAHRENHEIT, CONTENT_TYPE_TEXT_PLAIN)
 from homeassistant import core as hacore
 from homeassistant.helpers import state as state_helper
 from homeassistant.util.temperature import fahrenheit_to_celsius
 
+REQUIREMENTS = ['prometheus_client==0.0.19']
+
 _LOGGER = logging.getLogger(__name__)
 
-REQUIREMENTS = ['prometheus_client==0.0.19']
+API_ENDPOINT = '/api/prometheus'
 
 DOMAIN = 'prometheus'
 DEPENDENCIES = ['http']
@@ -30,8 +32,6 @@ CONFIG_SCHEMA = vol.Schema({
     DOMAIN: recorder.FILTER_SCHEMA,
 }, extra=vol.ALLOW_EXTRA)
 
-API_ENDPOINT = '/api/prometheus'
-
 
 def setup(hass, config):
     """Activate Prometheus component."""
@@ -45,11 +45,10 @@ def setup(hass, config):
     metrics = Metrics(prometheus_client, exclude, include)
 
     hass.bus.listen(EVENT_STATE_CHANGED, metrics.handle_event)
-
     return True
 
 
-class Metrics:
+class Metrics(object):
     """Model all of the metrics which should be exposed to Prometheus."""
 
     def __init__(self, prometheus_client, exclude, include):
@@ -81,7 +80,7 @@ class Metrics:
                                  entity_id not in self.include_entities):
             return
 
-        handler = '_handle_' + domain
+        handler = '_handle_{}'.format(domain)
 
         if hasattr(self, handler):
             getattr(self, handler)(state)
@@ -233,8 +232,8 @@ class PrometheusView(HomeAssistantView):
     @asyncio.coroutine
     def get(self, request):
         """Handle request for Prometheus metrics."""
-        _LOGGER.debug('Received Prometheus metrics request')
+        _LOGGER.debug("Received Prometheus metrics request")
 
         return web.Response(
             body=self.prometheus_client.generate_latest(),
-            content_type="text/plain")
+            content_type=CONTENT_TYPE_TEXT_PLAIN)