Metaclass already specified in base Device class.

No need to specify it in subclasses.

miio/airpurifier.py

@@ -6,7 +6,7 @@
 from functools import wraps
 import click
 from .device import Device, DeviceException
-from .click_common import DeviceGroupMeta, device_command, echo_return_status
+from .click_common import device_command, echo_return_status
 
 _LOGGER = logging.getLogger(__name__)
 
@@ -326,7 +326,7 @@ def __repr__(self) -> str:
  return s
 
 
-class AirPurifier(Device, metaclass=DeviceGroupMeta):
+class AirPurifier(Device):
  """Main class representing the air purifier."""
 
  @device_command(

miio/plug.py

@@ -2,9 +2,7 @@
 from typing import Dict, Any, Optional
 from collections import defaultdict
 from .device import Device
-from .click_common import (
- DeviceGroupMeta, device_command, echo_return_status
-)
+from .click_common import device_command, echo_return_status
 
 _LOGGER = logging.getLogger(__name__)
 
@@ -37,7 +35,7 @@ def __str__(self) -> str:
  return s
 
 
-class Plug(Device, metaclass=DeviceGroupMeta):
+class Plug(Device):
  """Main class representing the smart wifi socket / plug."""
 
  @device_command(

miio/vacuum.py

@@ -15,7 +15,7 @@
  SoundStatus, SoundInstallStatus)
 from .device import Device, DeviceException
 from .click_common import (
- DeviceGroup, DeviceGroupMeta, device_command, GlobalContextObject
+ DeviceGroup, device_command, GlobalContextObject
 )
 
 _LOGGER = logging.getLogger(__name__)
@@ -37,7 +37,7 @@ class Consumable(enum.Enum):
  SensorDirty = "sensor_dirty_time"
 
 
-class Vacuum(Device, metaclass=DeviceGroupMeta):
+class Vacuum(Device):
  """Main class representing the vacuum."""
 
  def __init__(self, ip: str, token: str = None, start_id: int = 0,