diff --git a/homeassistant/components/alexa/capabilities.py b/homeassistant/components/alexa/capabilities.py
index 63be7df2ead..5e1932ceb67 100644
--- a/homeassistant/components/alexa/capabilities.py
+++ b/homeassistant/components/alexa/capabilities.py
@@ -734,12 +734,11 @@ class AlexaPlaybackController(AlexaCapability):
             media_player.SUPPORT_STOP: "Stop",
         }
 
-        supported_operations = []
-        for operation in operations:
-            if operation & supported_features:
-                supported_operations.append(operations[operation])
-
-        return supported_operations
+        return [
+            value
+            for operation, value in operations.items()
+            if operation & supported_features
+        ]
 
 
 class AlexaInputController(AlexaCapability):
@@ -759,9 +758,7 @@ class AlexaInputController(AlexaCapability):
         source_list = self.entity.attributes.get(
             media_player.ATTR_INPUT_SOURCE_LIST, []
         )
-        input_list = AlexaInputController.get_valid_inputs(source_list)
-
-        return input_list
+        return AlexaInputController.get_valid_inputs(source_list)
 
     @staticmethod
     def get_valid_inputs(source_list):
@@ -1829,10 +1826,11 @@ class AlexaEqualizerController(AlexaCapability):
         configurations = None
         sound_mode_list = self.entity.attributes.get(media_player.ATTR_SOUND_MODE_LIST)
         if sound_mode_list:
-            supported_sound_modes = []
-            for sound_mode in sound_mode_list:
-                if sound_mode.upper() in ("MOVIE", "MUSIC", "NIGHT", "SPORT", "TV"):
-                    supported_sound_modes.append({"name": sound_mode.upper()})
+            supported_sound_modes = [
+                {"name": sound_mode.upper()}
+                for sound_mode in sound_mode_list
+                if sound_mode.upper() in ("MOVIE", "MUSIC", "NIGHT", "SPORT", "TV")
+            ]
 
             configurations = {"modes": {"supported": supported_sound_modes}}
 
@@ -1890,7 +1888,7 @@ class AlexaCameraStreamController(AlexaCapability):
 
     def camera_stream_configurations(self):
         """Return cameraStreamConfigurations object."""
-        camera_stream_configurations = [
+        return [
             {
                 "protocols": ["HLS"],
                 "resolutions": [{"width": 1280, "height": 720}],
@@ -1899,4 +1897,3 @@ class AlexaCameraStreamController(AlexaCapability):
                 "audioCodecs": ["AAC"],
             }
         ]
-        return camera_stream_configurations
diff --git a/homeassistant/components/alexa/entities.py b/homeassistant/components/alexa/entities.py
index fce05c8dc86..e5eca399b9c 100644
--- a/homeassistant/components/alexa/entities.py
+++ b/homeassistant/components/alexa/entities.py
@@ -268,8 +268,7 @@ class AlexaEntity:
             if not interface.properties_proactively_reported():
                 continue
 
-            for prop in interface.serialize_properties():
-                yield prop
+            yield from interface.serialize_properties()
 
     def serialize_discovery(self):
         """Serialize the entity for discovery."""
@@ -283,10 +282,12 @@ class AlexaEntity:
         }
 
         locale = self.config.locale
-        capabilities = []
-        for i in self.interfaces():
-            if locale in i.supported_locales:
-                capabilities.append(i.serialize_discovery())
+        capabilities = [
+            i.serialize_discovery()
+            for i in self.interfaces()
+            if locale in i.supported_locales
+        ]
+
         result["capabilities"] = capabilities
 
         return result
diff --git a/homeassistant/components/alexa/handlers.py b/homeassistant/components/alexa/handlers.py
index b3885588b0f..6b903665c17 100644
--- a/homeassistant/components/alexa/handlers.py
+++ b/homeassistant/components/alexa/handlers.py
@@ -355,7 +355,6 @@ async def async_api_deactivate(hass, config, directive, context):
 async def async_api_set_percentage(hass, config, directive, context):
     """Process a set percentage request."""
     entity = directive.entity
-    percentage = int(directive.payload["percentage"])
     service = None
     data = {ATTR_ENTITY_ID: entity.entity_id}
 
@@ -363,6 +362,7 @@ async def async_api_set_percentage(hass, config, directive, context):
         service = fan.SERVICE_SET_SPEED
         speed = "off"
 
+        percentage = int(directive.payload["percentage"])
         if percentage <= 33:
             speed = "low"
         elif percentage <= 66:
@@ -568,7 +568,7 @@ async def async_api_adjust_volume_step(hass, config, directive, context):
 
     data = {ATTR_ENTITY_ID: entity.entity_id}
 
-    for _ in range(0, abs(volume_int)):
+    for _ in range(abs(volume_int)):
         await hass.services.async_call(
             entity.domain, service_volume, data, blocking=False, context=context
         )
@@ -849,7 +849,6 @@ async def async_api_reportstate(hass, config, directive, context):
 async def async_api_set_power_level(hass, config, directive, context):
     """Process a SetPowerLevel request."""
     entity = directive.entity
-    percentage = int(directive.payload["powerLevel"])
     service = None
     data = {ATTR_ENTITY_ID: entity.entity_id}
 
@@ -857,6 +856,7 @@ async def async_api_set_power_level(hass, config, directive, context):
         service = fan.SERVICE_SET_SPEED
         speed = "off"
 
+        percentage = int(directive.payload["powerLevel"])
         if percentage <= 33:
             speed = "low"
         elif percentage <= 66:
@@ -920,10 +920,10 @@ async def async_api_arm(hass, config, directive, context):
 
     if arm_state == "ARMED_AWAY":
         service = SERVICE_ALARM_ARM_AWAY
-    if arm_state == "ARMED_STAY":
-        service = SERVICE_ALARM_ARM_HOME
-    if arm_state == "ARMED_NIGHT":
+    elif arm_state == "ARMED_NIGHT":
         service = SERVICE_ALARM_ARM_NIGHT
+    elif arm_state == "ARMED_STAY":
+        service = SERVICE_ALARM_ARM_HOME
 
     await hass.services.async_call(
         entity.domain, service, data, blocking=False, context=context
@@ -1383,7 +1383,7 @@ async def async_api_skipchannel(hass, config, directive, context):
     else:
         service_media = SERVICE_MEDIA_NEXT_TRACK
 
-    for _ in range(0, abs(channel)):
+    for _ in range(abs(channel)):
         await hass.services.async_call(
             entity.domain, service_media, data, blocking=False, context=context
         )
diff --git a/homeassistant/components/alexa/intent.py b/homeassistant/components/alexa/intent.py
index 4cb75c65bc9..f879b66268b 100644
--- a/homeassistant/components/alexa/intent.py
+++ b/homeassistant/components/alexa/intent.py
@@ -201,7 +201,7 @@ def resolve_slot_synonyms(key, request):
             _LOGGER.debug(
                 "Found multiple synonym resolutions for slot value: {%s: %s}",
                 key,
-                request["value"],
+                resolved_value,
             )
 
     return resolved_value
diff --git a/homeassistant/components/alexa/resources.py b/homeassistant/components/alexa/resources.py
index d2580f3bfea..5c02eca4fb2 100644
--- a/homeassistant/components/alexa/resources.py
+++ b/homeassistant/components/alexa/resources.py
@@ -296,14 +296,13 @@ class AlexaPresetResource(AlexaCapabilityResource):
             configuration["unitOfMeasure"] = self._unit_of_measure
 
         if self._presets:
-            preset_resources = []
-            for preset in self._presets:
-                preset_resources.append(
-                    {
-                        "rangeValue": preset["value"],
-                        "presetResources": self.serialize_labels(preset["labels"]),
-                    }
-                )
+            preset_resources = [
+                {
+                    "rangeValue": preset["value"],
+                    "presetResources": self.serialize_labels(preset["labels"]),
+                }
+                for preset in self._presets
+            ]
             configuration["presets"] = preset_resources
 
         return configuration