diff --git a/homeassistant/components/chromecast.py b/homeassistant/components/chromecast.py
index 3413de42f6a..3bfc79d58e8 100644
--- a/homeassistant/components/chromecast.py
+++ b/homeassistant/components/chromecast.py
@@ -100,12 +100,13 @@ def setup(bus, statemachine):
 
     casts = {}
 
+    eid_form = ENTITY_ID_FORMAT.format
+
     for host in hosts:
         try:
             cast = pychromecast.PyChromecast(host)
 
-            entity_id = ENTITY_ID_FORMAT.format(
-                            util.slugify(cast.device.friendly_name))
+            entity_id = eid_form(util.slugify(cast.device.friendly_name))
 
             casts[entity_id] = cast
 
diff --git a/homeassistant/util.py b/homeassistant/util.py
index ed6159b5dc0..d6b77372f51 100644
--- a/homeassistant/util.py
+++ b/homeassistant/util.py
@@ -60,8 +60,8 @@ def repr_helper(inp):
     """ Helps creating a more readable string representation of objects. """
     if isinstance(inp, dict):
         return u", ".join(
-            repr_helper(key)+u"="+repr_helper(item) for key, item in inp.items()
-            )
+            repr_helper(key)+u"="+repr_helper(item) for key, item
+            in inp.items())
     elif isinstance(inp, list):
         return u'[' + u', '.join(inp) + u']'
     elif isinstance(inp, datetime.datetime):