old_contents: """
  Pushover platform for notify component.
  
  For more details about this platform, please refer to the documentation at
  https://home-assistant.io/components/notify.pushover/
  """
  import logging
  
  import voluptuous as vol
  
  from homeassistant.components.notify import (
      ATTR_TITLE, ATTR_TITLE_DEFAULT, ATTR_TARGET, ATTR_DATA,
      BaseNotificationService)
  from homeassistant.const import CONF_API_KEY
  import homeassistant.helpers.config_validation as cv
  
  REQUIREMENTS = ['python-pushover==0.3']
  _LOGGER = logging.getLogger(__name__)
  
  
  CONF_USER_KEY = 'user_key'
  
  PLATFORM_SCHEMA = cv.PLATFORM_SCHEMA.extend({
      vol.Required(CONF_USER_KEY): cv.string,
      vol.Required(CONF_API_KEY): cv.string,
  })
  
  
  def get_service(hass, config, discovery_info=None):
      """Get the Pushover notification service."""
      from pushover import InitError
  
      try:
          return PushoverNotificationService(
              config[CONF_USER_KEY], config[CONF_API_KEY])
      except InitError:
          _LOGGER.error("Wrong API key supplied")
          return None
  
  
  class PushoverNotificationService(BaseNotificationService):
      """Implement the notification service for Pushover."""
  
      def __init__(self, user_key, api_token):
          """Initialize the service."""
          from pushover import Client
          self._user_key = user_key
          self._api_token = api_token
          self.pushover = Client(
              self._user_key, api_token=self._api_token)
  
      def send_message(self, message='', **kwargs):
          """Send a message to a user."""
          from pushover import RequestError
  
          # Make a copy and use empty dict if necessary
          data = dict(kwargs.get(ATTR_DATA) or {})
  
          data['title'] = kwargs.get(ATTR_TITLE, ATTR_TITLE_DEFAULT)
  
          targets = kwargs.get(ATTR_TARGET)
  
          if not isinstance(targets, list):
              targets = [targets]
  
          for target in targets:
              if target is not None:
                  data['device'] = target
  
              try:
                  self.pushover.send_message(message, **data)
              except ValueError as val_err:
                  _LOGGER.error(str(val_err))
              except RequestError:
                  _LOGGER.exception("Could not send pushover notification")
  
new_contents: """
  Pushover platform for notify component.
  
  For more details about this platform, please refer to the documentation at
  https://home-assistant.io/components/notify.pushover/
  """
  import logging
  
  import voluptuous as vol
  
  from homeassistant.components.notify import (
      ATTR_TITLE, ATTR_TITLE_DEFAULT, ATTR_TARGET, ATTR_DATA,
      BaseNotificationService, PLATFORM_SCHEMA)
  from homeassistant.const import CONF_API_KEY
  import homeassistant.helpers.config_validation as cv
  
  REQUIREMENTS = ['python-pushover==0.3']
  _LOGGER = logging.getLogger(__name__)
  
  
  CONF_USER_KEY = 'user_key'
  
  PLATFORM_SCHEMA = PLATFORM_SCHEMA.extend({
      vol.Required(CONF_USER_KEY): cv.string,
      vol.Required(CONF_API_KEY): cv.string,
  })
  
  
  def get_service(hass, config, discovery_info=None):
      """Get the Pushover notification service."""
      from pushover import InitError
  
      try:
          return PushoverNotificationService(
              config[CONF_USER_KEY], config[CONF_API_KEY])
      except InitError:
          _LOGGER.error("Wrong API key supplied")
          return None
  
  
  class PushoverNotificationService(BaseNotificationService):
      """Implement the notification service for Pushover."""
  
      def __init__(self, user_key, api_token):
          """Initialize the service."""
          from pushover import Client
          self._user_key = user_key
          self._api_token = api_token
          self.pushover = Client(
              self._user_key, api_token=self._api_token)
  
      def send_message(self, message='', **kwargs):
          """Send a message to a user."""
          from pushover import RequestError
  
          # Make a copy and use empty dict if necessary
          data = dict(kwargs.get(ATTR_DATA) or {})
  
          data['title'] = kwargs.get(ATTR_TITLE, ATTR_TITLE_DEFAULT)
  
          targets = kwargs.get(ATTR_TARGET)
  
          if not isinstance(targets, list):
              targets = [targets]
  
          for target in targets:
              if target is not None:
                  data['device'] = target
  
              try:
                  self.pushover.send_message(message, **data)
              except ValueError as val_err:
                  _LOGGER.error(str(val_err))
              except RequestError:
                  _LOGGER.exception("Could not send pushover notification")
  
subject: Fix pushover schema (#21073)