entity.py

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"""The AirVisual component."""
 
from __future__ import annotations
 
from homeassistant.config_entries import ConfigEntry
from homeassistant.core import callback
from homeassistant.helpers.entity import EntityDescription
from homeassistant.helpers.update_coordinator import (
    CoordinatorEntity,
    DataUpdateCoordinator,
)
 
 
class AirVisualEntity(CoordinatorEntity):
    """Define a generic AirVisual entity."""
 
    def __init__(
        self,
        coordinator: DataUpdateCoordinator,
        entry: ConfigEntry,
        description: EntityDescription,
    ) -> None:
        """Initialize."""
        super().__init__(coordinator)
 
        self._attr_extra_state_attributes_attr_extra_state_attributes = {}
        self._entry_entry = entry
        self.entity_descriptionentity_description = description
 
    async def async_added_to_hass(self) -> None:
        """Register callbacks."""
        await super().async_added_to_hass()
 
        @callback
        def update() -> None:
            """Update the state."""
            self.update_from_latest_dataupdate_from_latest_data()
            self.async_write_ha_state()
 
        self.async_on_remove(self.coordinator.async_add_listener(update))
 
        self.update_from_latest_dataupdate_from_latest_data()
 
    @callback
    def update_from_latest_data(self) -> None:
        """Update the entity from the latest data."""
        raise NotImplementedError