Fix repr for device created with no sysinfo or discovery info" (python-kasa#1266)

sdb9696 · rytilahti · rytilahti · commit d02e01727afb · 2025-11-10T23:47:28.000+01:00
Co-authored-by: Teemu R. &lt;tpr@iki.fi&gt;
diff --git a/kasa/device.py b/kasa/device.py
@@ -210,12 +210,12 @@ def __init__(
         self.protocol: BaseProtocol = protocol or IotProtocol(
             transport=XorTransport(config=config or DeviceConfig(host=host)),
         )
-        _LOGGER.debug("Initializing %s of type %s", self.host, type(self))
+        self._last_update: Any = None
+        _LOGGER.debug("Initializing %s of type %s", host, type(self))
         self._device_type = DeviceType.Unknown
         # TODO: typing Any is just as using Optional[Dict] would require separate
         #       checks in accessors. the @updated_required decorator does not ensure
         #       mypy that these are not accessed incorrectly.
-        self._last_update: Any = None
         self._discovery_info: dict[str, Any] | None = None
 
         self._features: dict[str, Feature] = {}
@@ -492,6 +492,8 @@ async def factory_reset(self) -> None:
 
     def __repr__(self) -> str:
         update_needed = " - update() needed" if not self._last_update else ""
+        if not self._last_update and not self._discovery_info:
+            return f"<{self.device_type} at {self.host}{update_needed}>"
         return (
             f"<{self.device_type} at {self.host} -"
             f" {self.alias} ({self.model}){update_needed}>"
diff --git a/kasa/iot/iotdevice.py b/kasa/iot/iotdevice.py
@@ -42,7 +42,9 @@ def requires_update(f: Callable) -> Any:
         @functools.wraps(f)
         async def wrapped(*args: Any, **kwargs: Any) -> Any:
             self = args[0]
-            if self._last_update is None and f.__name__ not in self._sys_info:
+            if self._last_update is None and (
+                self._sys_info is None or f.__name__ not in self._sys_info
+            ):
                 raise KasaException("You need to await update() to access the data")
             return await f(*args, **kwargs)
 
@@ -51,7 +53,9 @@ async def wrapped(*args: Any, **kwargs: Any) -> Any:
         @functools.wraps(f)
         def wrapped(*args: Any, **kwargs: Any) -> Any:
             self = args[0]
-            if self._last_update is None and f.__name__ not in self._sys_info:
+            if self._last_update is None and (
+                self._sys_info is None or f.__name__ not in self._sys_info
+            ):
                 raise KasaException("You need to await update() to access the data")
             return f(*args, **kwargs)
 
diff --git a/kasa/smart/smartchilddevice.py b/kasa/smart/smartchilddevice.py
@@ -107,16 +107,26 @@ async def create(
     @property
     def device_type(self) -> DeviceType:
         """Return child device type."""
-        category = self.sys_info["category"]
-        dev_type = self.CHILD_DEVICE_TYPE_MAP.get(category)
-        if dev_type is None:
-            _LOGGER.warning(
-                "Unknown child device type %s for model %s, please open issue",
-                category,
-                self.model,
-            )
-            dev_type = DeviceType.Unknown
-        return dev_type
+        if self._device_type is not DeviceType.Unknown:
+            return self._device_type
+
+        if self.sys_info and (category := self.sys_info.get("category")):
+            dev_type = self.CHILD_DEVICE_TYPE_MAP.get(category)
+            if dev_type is None:
+                _LOGGER.warning(
+                    "Unknown child device type %s for model %s, please open issue",
+                    category,
+                    self.model,
+                )
+                self._device_type = DeviceType.Unknown
+            else:
+                self._device_type = dev_type
+
+        return self._device_type
 
     def __repr__(self) -> str:
+        if not self._parent:
+            return f"<{self.device_type}(child) without parent>"
+        if not self._parent._last_update:
+            return f"<{self.device_type}(child) of {self._parent}>"
         return f"<{self.device_type} {self.alias} ({self.model}) of {self._parent}>"
diff --git a/kasa/smart/smartdevice.py b/kasa/smart/smartdevice.py
@@ -757,6 +757,10 @@ def device_type(self) -> DeviceType:
 
         # Fallback to device_type (from disco info)
         type_str = self._info.get("type", self._info.get("device_type"))
+
+        if not type_str:  # no update or discovery info
+            return self._device_type
+
         self._device_type = self._get_device_type_from_components(
             list(self._components.keys()), type_str
         )
diff --git a/kasa/smartcamera/smartcamera.py b/kasa/smartcamera/smartcamera.py
@@ -25,8 +25,11 @@ class SmartCamera(SmartDevice):
     @staticmethod
     def _get_device_type_from_sysinfo(sysinfo: dict[str, Any]) -> DeviceType:
         """Find type to be displayed as a supported device category."""
-        device_type = sysinfo["device_type"]
-        if device_type.endswith("HUB"):
+        if (
+            sysinfo
+            and (device_type := sysinfo.get("device_type"))
+            and device_type.endswith("HUB")
+        ):
             return DeviceType.Hub
         return DeviceType.Camera
 
diff --git a/tests/test_childdevice.py b/tests/test_childdevice.py
@@ -9,7 +9,7 @@
 from kasa.device_type import DeviceType
 from kasa.protocols.smartprotocol import _ChildProtocolWrapper
 from kasa.smart.smartchilddevice import SmartChildDevice
-from kasa.smart.smartdevice import NON_HUB_PARENT_ONLY_MODULES
+from kasa.smart.smartdevice import NON_HUB_PARENT_ONLY_MODULES, SmartDevice
 
 from .conftest import (
     parametrize,
@@ -139,3 +139,19 @@ async def test_child_time(dev: Device, freezer: FrozenDateTimeFactory):
     assert dev.parent is None
     for child in dev.children:
         assert child.time != fallback_time
+
+
+async def test_child_device_type_unknown(caplog):
+    """Test for device type when category is unknown."""
+
+    class DummyDevice(SmartChildDevice):
+        def __init__(self):
+            super().__init__(
+                SmartDevice("127.0.0.1"),
+                {"device_id": "1", "category": "foobar"},
+                {"device", 1},
+            )
+
+    assert DummyDevice().device_type is DeviceType.Unknown
+    msg = "Unknown child device type foobar for model None, please open issue"
+    assert msg in caplog.text
diff --git a/tests/test_device.py b/tests/test_device.py
@@ -14,14 +14,23 @@
 
 import kasa
 from kasa import Credentials, Device, DeviceConfig, DeviceType, KasaException, Module
-from kasa.iot import IotDevice
+from kasa.iot import (
+    IotBulb,
+    IotDevice,
+    IotDimmer,
+    IotLightStrip,
+    IotPlug,
+    IotStrip,
+    IotWallSwitch,
+)
 from kasa.iot.iottimezone import (
     TIMEZONE_INDEX,
     get_timezone,
     get_timezone_index,
 )
 from kasa.iot.modules import IotLightPreset
 from kasa.smart import SmartChildDevice, SmartDevice
+from kasa.smartcamera import SmartCamera
 
 
 def _get_subclasses(of_class):
@@ -80,6 +89,41 @@ async def test_device_class_ctors(device_class_name_obj):
     assert dev.credentials == credentials
 
 
+@device_classes
+async def test_device_class_repr(device_class_name_obj):
+    """Test device repr when update() not called and no discovery info."""
+    host = "127.0.0.2"
+    port = 1234
+    credentials = Credentials("foo", "bar")
+    config = DeviceConfig(host, port_override=port, credentials=credentials)
+    klass = device_class_name_obj[1]
+    if issubclass(klass, SmartChildDevice):
+        parent = SmartDevice(host, config=config)
+        dev = klass(
+            parent, {"dummy": "info", "device_id": "dummy"}, {"dummy": "components"}
+        )
+    else:
+        dev = klass(host, config=config)
+
+    CLASS_TO_DEFAULT_TYPE = {
+        IotDevice: DeviceType.Unknown,
+        IotBulb: DeviceType.Bulb,
+        IotPlug: DeviceType.Plug,
+        IotDimmer: DeviceType.Dimmer,
+        IotStrip: DeviceType.Strip,
+        IotWallSwitch: DeviceType.WallSwitch,
+        IotLightStrip: DeviceType.LightStrip,
+        SmartChildDevice: DeviceType.Unknown,
+        SmartDevice: DeviceType.Unknown,
+        SmartCamera: DeviceType.Camera,
+    }
+    type_ = CLASS_TO_DEFAULT_TYPE[klass]
+    child_repr = "<DeviceType.Unknown(child) of <DeviceType.Unknown at 127.0.0.2 - update() needed>>"
+    not_child_repr = f"<{type_} at 127.0.0.2 - update() needed>"
+    expected_repr = child_repr if klass is SmartChildDevice else not_child_repr
+    assert repr(dev) == expected_repr
+
+
 async def test_create_device_with_timeout():
     """Make sure timeout is passed to the protocol."""
     host = "127.0.0.1"
