old_contents: # -*- coding: utf-8 -*-
  #
  # Licensed to the Apache Software Foundation (ASF) under one
  # or more contributor license agreements.  See the NOTICE file
  # distributed with this work for additional information
  # regarding copyright ownership.  The ASF licenses this file
  # to you under the Apache License, Version 2.0 (the
  # "License"); you may not use this file except in compliance
  # with the License.  You may obtain a copy of the License at
  #
  #   http://www.apache.org/licenses/LICENSE-2.0
  #
  # Unless required by applicable law or agreed to in writing,
  # software distributed under the License is distributed on an
  # "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
  # KIND, either express or implied.  See the License for the
  # specific language governing permissions and limitations
  # under the License.
  #
  import importlib
  import socket
  from airflow.configuration import (conf, AirflowConfigException)
  
  
  def get_host_ip_address():
      socket.gethostbyname(socket.getfqdn())
  
  
  def get_hostname():
      """
      Fetch the hostname using the callable from the config or using
      `socket.getfqdn` as a fallback.
      """
      # First we attempt to fetch the callable path from the config.
      try:
          callable_path = conf.get('core', 'hostname_callable')
      except AirflowConfigException:
          callable_path = None
  
      # Then we handle the case when the config is missing or empty. This is the
      # default behavior.
      if not callable_path:
          return socket.getfqdn()
  
      # Since we have a callable path, we try to import and run it next.
      module_path, attr_name = callable_path.split(':')
      module = importlib.import_module(module_path)
      callable = getattr(module, attr_name)
      return callable()
  
new_contents: # -*- coding: utf-8 -*-
  #
  # Licensed to the Apache Software Foundation (ASF) under one
  # or more contributor license agreements.  See the NOTICE file
  # distributed with this work for additional information
  # regarding copyright ownership.  The ASF licenses this file
  # to you under the Apache License, Version 2.0 (the
  # "License"); you may not use this file except in compliance
  # with the License.  You may obtain a copy of the License at
  #
  #   http://www.apache.org/licenses/LICENSE-2.0
  #
  # Unless required by applicable law or agreed to in writing,
  # software distributed under the License is distributed on an
  # "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
  # KIND, either express or implied.  See the License for the
  # specific language governing permissions and limitations
  # under the License.
  #
  import importlib
  import socket
  from airflow.configuration import (conf, AirflowConfigException)
  
  
  def get_host_ip_address():
      return socket.gethostbyname(socket.getfqdn())
  
  
  def get_hostname():
      """
      Fetch the hostname using the callable from the config or using
      `socket.getfqdn` as a fallback.
      """
      # First we attempt to fetch the callable path from the config.
      try:
          callable_path = conf.get('core', 'hostname_callable')
      except AirflowConfigException:
          callable_path = None
  
      # Then we handle the case when the config is missing or empty. This is the
      # default behavior.
      if not callable_path:
          return socket.getfqdn()
  
      # Since we have a callable path, we try to import and run it next.
      module_path, attr_name = callable_path.split(':')
      module = importlib.import_module(module_path)
      callable = getattr(module, attr_name)
      return callable()
  
subject: Fix bug for earlier change to allow using IP as hostname (#5513)