Azure flake8 dep, docstring fixes (#25605)

* Fix Azure CI flake8 deps

* Docstyle fixes

azure-pipelines-ci.yml

@@ -38,7 +38,7 @@ stages:
         python -m venv venv
 
         . venv/bin/activate
-        pip install flake8
+        pip install -r requirements_test.txt
       displayName: 'Setup Env'
     - script: |
         . venv/bin/activate

homeassistant/components/rejseplanen/sensor.py

@@ -174,7 +174,7 @@ class PublicTransportData():
         self.info = []
 
         def intersection(lst1, lst2):
-            """Return items contained in both lists"""
+            """Return items contained in both lists."""
             return list(set(lst1) & set(lst2))
 
         # Limit search to selected types, to get more results

homeassistant/components/ring/camera.py

@@ -147,7 +147,7 @@ class RingCam(Camera):
 
     @property
     def should_poll(self):
-        """Updates controlled via the hub."""
+        """Return False, updates are controlled via the hub."""
         return False
 
     def update(self):

homeassistant/components/ring/sensor.py

@@ -109,7 +109,7 @@ class RingSensor(Entity):
 
     @property
     def should_poll(self):
-        """Updates controlled via the hub."""
+        """Return False, updates are controlled via the hub."""
         return False
 
     @property

homeassistant/components/zha/core/channels/__init__.py

@@ -204,6 +204,7 @@ class ZigbeeChannel(LogMixin):
         return result.get(attribute)
 
     def log(self, level, msg, *args):
+        """Log a message."""
         msg = '[%s]: ' + msg
         args = (self.unique_id, ) + args
         _LOGGER.log(level, msg, *args)
@@ -301,6 +302,7 @@ class ZDOChannel(LogMixin):
         self._status = ChannelStatus.CONFIGURED
 
     def log(self, level, msg, *args):
+        """Log a message."""
         msg = '[%s:ZDO](%s): ' + msg
         args = (self._zha_device.nwk, self._zha_device.model, ) + args
         _LOGGER.log(level, msg, *args)

homeassistant/components/zha/core/device.py

@@ -444,6 +444,7 @@ class ZHADevice(LogMixin):
         return response
 
     def log(self, level, msg, *args):
+        """Log a message."""
         msg = '[%s](%s): ' + msg
         args = (self.nwk, self.model, ) + args
         _LOGGER.log(level, msg, *args)

homeassistant/components/zha/entity.py

@@ -189,6 +189,7 @@ class ZhaEntity(RestoreEntity, LogMixin, entity.Entity):
         self._unsubs.append(unsub)
 
     def log(self, level, msg, *args):
+        """Log a message."""
         msg = '%s: ' + msg
         args = (self.entity_id, ) + args
         _LOGGER.log(level, msg, *args)

tests/components/emulated_hue/test_hue_api.py

@@ -225,6 +225,7 @@ def test_discover_lights(hue_client):
 
 @asyncio.coroutine
 def test_light_without_brightness_supported(hass_hue, hue_client):
+    """Test that light without brightness is supported."""
     light_without_brightness_json = yield from perform_get_light_state(
         hue_client, 'light.no_brightness', 200)