pep257 fixes

tests/components/sensor/test_wunderground.py

@@ -29,9 +29,9 @@ ICON_URL = 'http://icons.wxug.com/i/c/k/clear.gif'
 
 def mocked_requests_get(*args, **kwargs):
     """Mock requests.get invocations."""
-
     class MockResponse:
         """Class to represent a mocked response."""
+
         def __init__(self, json_data, status_code):
             """Initialize the mock response class."""
             self.json_data = json_data
@@ -83,6 +83,7 @@ class TestWundergroundSetup(unittest.TestCase):
     DEVICES = []
 
     def add_devices(self, devices):
+        """Mock add devices."""
         for device in devices:
             self.DEVICES.append(device)