From eae306c3f1c254f444ff66b9ced80ea2aaf1f4bf Mon Sep 17 00:00:00 2001
From: Tyler Page <iamtpage@users.noreply.github.com>
Date: Tue, 21 May 2019 12:26:11 +0000
Subject: [PATCH] Fix iterating over NoneType exception (#23648)

* Fix iterating over NoneType exception

When self._dark_sky is None, don't try to return self._dark_sky.units

* Fix wrong check
---
 homeassistant/components/darksky/weather.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/homeassistant/components/darksky/weather.py b/homeassistant/components/darksky/weather.py
index dd945e7b01c..84de690504e 100644
--- a/homeassistant/components/darksky/weather.py
+++ b/homeassistant/components/darksky/weather.py
@@ -103,6 +103,8 @@ class DarkSkyWeather(WeatherEntity):
     @property
     def temperature_unit(self):
         """Return the unit of measurement."""
+        if self._dark_sky.units is None:
+            return None
         return TEMP_FAHRENHEIT if 'us' in self._dark_sky.units \
             else TEMP_CELSIUS