old_contents: """Base UptimeRobot entity."""
  from __future__ import annotations
  
  from pyuptimerobot import UptimeRobotMonitor
  
  from homeassistant.const import ATTR_ATTRIBUTION
  from homeassistant.helpers.entity import EntityDescription
  from homeassistant.helpers.update_coordinator import (
      CoordinatorEntity,
      DataUpdateCoordinator,
  )
  
  from .const import ATTR_TARGET, ATTRIBUTION, DOMAIN
  
  
  class UptimeRobotEntity(CoordinatorEntity):
      """Base UptimeRobot entity."""
  
      def __init__(
          self,
          coordinator: DataUpdateCoordinator,
          description: EntityDescription,
          monitor: UptimeRobotMonitor,
      ) -> None:
          """Initialize Uptime Robot entities."""
          super().__init__(coordinator)
          self.entity_description = description
          self._monitor = monitor
          self._attr_device_info = {
              "identifiers": {(DOMAIN, str(self.monitor.id))},
              "name": self.monitor.friendly_name,
              "manufacturer": "Uptime Robot Team",
              "entry_type": "service",
              "model": self.monitor.type.name,
          }
          self._attr_extra_state_attributes = {
              ATTR_ATTRIBUTION: ATTRIBUTION,
              ATTR_TARGET: self.monitor.url,
          }
          self._attr_unique_id = str(self.monitor.id)
  
      @property
      def _monitors(self) -> list[UptimeRobotMonitor]:
          """Return all monitors."""
          return self.coordinator.data or []
  
      @property
      def monitor(self) -> UptimeRobotMonitor:
          """Return the monitor for this entity."""
          return next(
              (
                  monitor
                  for monitor in self._monitors
                  if str(monitor.id) == self.entity_description.key
              ),
              self._monitor,
          )
  
      @property
      def monitor_available(self) -> bool:
          """Returtn if the monitor is available."""
          return bool(self.monitor.status == 2)
  
new_contents: """Base UptimeRobot entity."""
  from __future__ import annotations
  
  from pyuptimerobot import UptimeRobotMonitor
  
  from homeassistant.helpers.entity import EntityDescription
  from homeassistant.helpers.update_coordinator import (
      CoordinatorEntity,
      DataUpdateCoordinator,
  )
  
  from .const import ATTR_TARGET, ATTRIBUTION, DOMAIN
  
  
  class UptimeRobotEntity(CoordinatorEntity):
      """Base UptimeRobot entity."""
  
      _attr_attribution = ATTRIBUTION
  
      def __init__(
          self,
          coordinator: DataUpdateCoordinator,
          description: EntityDescription,
          monitor: UptimeRobotMonitor,
      ) -> None:
          """Initialize Uptime Robot entities."""
          super().__init__(coordinator)
          self.entity_description = description
          self._monitor = monitor
          self._attr_device_info = {
              "identifiers": {(DOMAIN, str(self.monitor.id))},
              "name": self.monitor.friendly_name,
              "manufacturer": "Uptime Robot Team",
              "entry_type": "service",
              "model": self.monitor.type.name,
          }
          self._attr_extra_state_attributes = {
              ATTR_TARGET: self.monitor.url,
          }
          self._attr_unique_id = str(self.monitor.id)
  
      @property
      def _monitors(self) -> list[UptimeRobotMonitor]:
          """Return all monitors."""
          return self.coordinator.data or []
  
      @property
      def monitor(self) -> UptimeRobotMonitor:
          """Return the monitor for this entity."""
          return next(
              (
                  monitor
                  for monitor in self._monitors
                  if str(monitor.id) == self.entity_description.key
              ),
              self._monitor,
          )
  
      @property
      def monitor_available(self) -> bool:
          """Returtn if the monitor is available."""
          return bool(self.monitor.status == 2)
  
subject: Migrate attribution attribute for UptimeRobot (#57508)