Implement choices_attribute for setting decorator (#1587)

Split out from #1543
Will be used for Multi Map Enum select.

miio/device.py

@@ -5,7 +5,12 @@
 import click
 
 from .click_common import DeviceGroupMeta, LiteralParamType, command, format_output
-from .descriptors import ActionDescriptor, SensorDescriptor, SettingDescriptor
+from .descriptors import (
+    ActionDescriptor,
+    EnumSettingDescriptor,
+    SensorDescriptor,
+    SettingDescriptor,
+)
 from .deviceinfo import DeviceInfo
 from .devicestatus import DeviceStatus
 from .exceptions import DeviceInfoUnavailableException, PayloadDecodeException
@@ -258,6 +263,12 @@ def settings(self) -> Dict[str, SettingDescriptor]:
                     )
 
                 setting.setter = getattr(self, setting.setter_name)
+            if (
+                isinstance(setting, EnumSettingDescriptor)
+                and setting.choices_attribute is not None
+            ):
+                retrieve_choices_function = getattr(self, setting.choices_attribute)
+                setting.choices = retrieve_choices_function()  # This can do IO
 
         return settings
 

miio/devicestatus.py

@@ -219,10 +219,6 @@ def decorator_setting(func):
                 step=step or 1,
             )
         elif choices or choices_attribute:
-            if choices_attribute is not None:
-                # TODO: adding choices from attribute is a bit more complex, as it requires a way to
-                # construct enums pointed by the attribute
-                raise NotImplementedError("choices_attribute is not yet implemented")
             descriptor = EnumSettingDescriptor(
                 **common_values,
                 choices=choices,