Add flake8 comprehensions checks to pre-commit & CI (#48111)

.pre-commit-config.yaml

@@ -32,6 +32,7 @@ repos:
           # default yet due to https://github.com/plinss/flake8-noqa/issues/1
           # - flake8-noqa==1.1.0
           - pydocstyle==5.1.1
+          - flake8-comprehensions==3.4.0
         files: ^(homeassistant|script|tests)/.+\.py$
   - repo: https://github.com/PyCQA/bandit
     rev: 1.7.0

homeassistant/components/denon/media_player.py

@@ -230,7 +230,7 @@ class DenonDevice(MediaPlayerEntity):
     @property
     def source_list(self):
         """Return the list of available input sources."""
-        return sorted(list(self._source_list))
+        return sorted(self._source_list)
 
     @property
     def media_title(self):

homeassistant/components/emulated_hue/hue_api.py

@@ -391,11 +391,9 @@ class HueOneLightChangeView(HomeAssistantView):
                     return self.json_message("Bad request", HTTP_BAD_REQUEST)
         if HUE_API_STATE_XY in request_json:
             try:
-                parsed[STATE_XY] = tuple(
-                    (
-                        float(request_json[HUE_API_STATE_XY][0]),
-                        float(request_json[HUE_API_STATE_XY][1]),
-                    )
+                parsed[STATE_XY] = (
+                    float(request_json[HUE_API_STATE_XY][0]),
+                    float(request_json[HUE_API_STATE_XY][1]),
                 )
             except ValueError:
                 _LOGGER.error("Unable to parse data (2): %s", request_json)

homeassistant/components/flux_led/light.py

@@ -98,7 +98,7 @@ TRANSITION_GRADUAL = "gradual"
 TRANSITION_JUMP = "jump"
 TRANSITION_STROBE = "strobe"
 
-FLUX_EFFECT_LIST = sorted(list(EFFECT_MAP)) + [EFFECT_RANDOM]
+FLUX_EFFECT_LIST = sorted(EFFECT_MAP) + [EFFECT_RANDOM]
 
 CUSTOM_EFFECT_SCHEMA = vol.Schema(
     {

homeassistant/components/light/__init__.py

@@ -610,7 +610,7 @@ class LightEntity(ToggleEntity):
             data[ATTR_EFFECT_LIST] = self.effect_list
 
         data[ATTR_SUPPORTED_COLOR_MODES] = sorted(
-            list(self._light_internal_supported_color_modes)
+            self._light_internal_supported_color_modes
         )
 
         return data

homeassistant/components/nad/media_player.py

@@ -163,7 +163,7 @@ class NAD(MediaPlayerEntity):
     @property
     def source_list(self):
         """List of available input sources."""
-        return sorted(list(self._reverse_mapping))
+        return sorted(self._reverse_mapping)
 
     @property
     def available(self):

homeassistant/components/sms/gateway.py

@@ -43,7 +43,7 @@ class Gateway:
         )
         entries = self.get_and_delete_all_sms(state_machine)
         _LOGGER.debug("SMS entries:%s", entries)
-        data = list()
+        data = []
 
         for entry in entries:
             decoded_entry = gammu.DecodeSMS(entry)
@@ -78,7 +78,7 @@ class Gateway:
         start_remaining = remaining
         # Get all sms
         start = True
-        entries = list()
+        entries = []
         all_parts = -1
         all_parts_arrived = False
         _LOGGER.debug("Start remaining:%i", start_remaining)

homeassistant/components/uk_transport/sensor.py

@@ -32,9 +32,7 @@ CONF_DESTINATION = "destination"
 
 _QUERY_SCHEME = vol.Schema(
     {
-        vol.Required(CONF_MODE): vol.All(
-            cv.ensure_list, [vol.In(list(["bus", "train"]))]
-        ),
+        vol.Required(CONF_MODE): vol.All(cv.ensure_list, [vol.In(["bus", "train"])]),
         vol.Required(CONF_ORIGIN): cv.string,
         vol.Required(CONF_DESTINATION): cv.string,
     }

homeassistant/components/unifi/config_flow.py

@@ -319,7 +319,7 @@ class UnifiOptionsFlowHandler(config_entries.OptionsFlow):
                 if "name" in wlan
             }
         )
-        ssid_filter = {ssid: ssid for ssid in sorted(list(ssids))}
+        ssid_filter = {ssid: ssid for ssid in sorted(ssids)}
 
         return self.async_show_form(
             step_id="device_tracker",

homeassistant/components/webostv/media_player.py

@@ -271,7 +271,7 @@ class LgWebOSMediaPlayerEntity(MediaPlayerEntity):
     @property
     def source_list(self):
         """List of available input sources."""
-        return sorted(list(self._source_list))
+        return sorted(self._source_list)
 
     @property
     def media_content_type(self):

homeassistant/util/dt.py

@@ -227,7 +227,7 @@ def parse_time_expression(parameter: Any, min_value: int, max_value: int) -> lis
     elif not hasattr(parameter, "__iter__"):
         res = [int(parameter)]
     else:
-        res = list(sorted(int(x) for x in parameter))
+        res = sorted(int(x) for x in parameter)
 
     for val in res:
         if val < min_value or val > max_value:

requirements_test_pre_commit.txt

@@ -3,6 +3,7 @@
 bandit==1.7.0
 black==20.8b1
 codespell==2.0.0
+flake8-comprehensions==3.4.0
 flake8-docstrings==1.5.0
 flake8==3.8.4
 isort==5.7.0

tests/common.py

@@ -766,7 +766,7 @@ class MockConfigEntry(config_entries.ConfigEntry):
 def patch_yaml_files(files_dict, endswith=True):
     """Patch load_yaml with a dictionary of yaml files."""
     # match using endswith, start search with longest string
-    matchlist = sorted(list(files_dict.keys()), key=len) if endswith else []
+    matchlist = sorted(files_dict.keys(), key=len) if endswith else []
 
     def mock_open_f(fname, **_):
         """Mock open() in the yaml module, used by load_yaml."""

tests/components/automation/test_trace.py

@@ -32,7 +32,7 @@ def test_json_encoder(hass):
 
     # Test serializing a set()
     data = {"milk", "beer"}
-    assert sorted(ha_json_enc.default(data)) == sorted(list(data))
+    assert sorted(ha_json_enc.default(data)) == sorted(data)
 
     # Test serializong object which implements as_dict
     assert ha_json_enc.default(state) == state.as_dict()

tests/components/group/test_init.py

@@ -579,7 +579,7 @@ async def test_service_group_set_group_remove_group(hass):
     assert group_state.attributes[group.ATTR_AUTO]
     assert group_state.attributes["friendly_name"] == "Test2"
     assert group_state.attributes["icon"] == "mdi:camera"
-    assert sorted(list(group_state.attributes["entity_id"])) == sorted(
+    assert sorted(group_state.attributes["entity_id"]) == sorted(
         ["test.entity_bla1", "test.entity_id2"]
     )
 

tests/components/zwave/test_init.py

@@ -861,7 +861,7 @@ async def test_entity_discovery(
 
     assert values.primary is value_class.primary
     assert len(list(values)) == 3
-    assert sorted(list(values), key=lambda a: id(a)) == sorted(
+    assert sorted(values, key=lambda a: id(a)) == sorted(
         [value_class.primary, None, None], key=lambda a: id(a)
     )
 
@@ -885,7 +885,7 @@ async def test_entity_discovery(
 
     assert values.secondary is value_class.secondary
     assert len(list(values)) == 3
-    assert sorted(list(values), key=lambda a: id(a)) == sorted(
+    assert sorted(values, key=lambda a: id(a)) == sorted(
         [value_class.primary, value_class.secondary, None], key=lambda a: id(a)
     )
 
@@ -902,7 +902,7 @@ async def test_entity_discovery(
 
     assert values.optional is value_class.optional
     assert len(list(values)) == 3
-    assert sorted(list(values), key=lambda a: id(a)) == sorted(
+    assert sorted(values, key=lambda a: id(a)) == sorted(
         [value_class.primary, value_class.secondary, value_class.optional],
         key=lambda a: id(a),
     )
@@ -961,7 +961,7 @@ async def test_entity_existing_values(
     assert values.secondary is value_class.secondary
     assert values.optional is value_class.optional
     assert len(list(values)) == 3
-    assert sorted(list(values), key=lambda a: id(a)) == sorted(
+    assert sorted(values, key=lambda a: id(a)) == sorted(
         [value_class.primary, value_class.secondary, value_class.optional],
         key=lambda a: id(a),
     )

tests/helpers/test_json.py

@@ -17,7 +17,7 @@ def test_json_encoder(hass):
 
     # Test serializing a set()
     data = {"milk", "beer"}
-    assert sorted(ha_json_enc.default(data)) == sorted(list(data))
+    assert sorted(ha_json_enc.default(data)) == sorted(data)
 
     # Test serializing an object which implements as_dict
     assert ha_json_enc.default(state) == state.as_dict()

tests/util/test_dt.py

@@ -177,14 +177,14 @@ def test_get_age():
 
 def test_parse_time_expression():
     """Test parse_time_expression."""
-    assert [x for x in range(60)] == dt_util.parse_time_expression("*", 0, 59)
-    assert [x for x in range(60)] == dt_util.parse_time_expression(None, 0, 59)
+    assert list(range(60)) == dt_util.parse_time_expression("*", 0, 59)
+    assert list(range(60)) == dt_util.parse_time_expression(None, 0, 59)
 
-    assert [x for x in range(0, 60, 5)] == dt_util.parse_time_expression("/5", 0, 59)
+    assert list(range(0, 60, 5)) == dt_util.parse_time_expression("/5", 0, 59)
 
     assert [1, 2, 3] == dt_util.parse_time_expression([2, 1, 3], 0, 59)
 
-    assert [x for x in range(24)] == dt_util.parse_time_expression("*", 0, 23)
+    assert list(range(24)) == dt_util.parse_time_expression("*", 0, 23)
 
     assert [42] == dt_util.parse_time_expression(42, 0, 59)
     assert [42] == dt_util.parse_time_expression("42", 0, 59)