text: # Copyright 2016 Julien Danjou
  # Copyright 2016 Joshua Harlow
  # Copyright 2013-2014 Ray Holder
  #
  # Licensed 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.
  
  from tenacity import _utils
  
  
  def before_sleep_nothing(retry_obj, sleep, last_result):
      """Before call strategy that does nothing."""
  
  
  def before_sleep_log(logger, log_level):
      """Before call strategy that logs to some logger the attempt."""
      def log_it(retry_obj, sleep, last_result):
          logger.log(log_level,
                     "Retrying %s in %d seconds as it raised %s.",
                     _utils.get_callback_name(retry_obj.fn),
                     sleep,
                     last_result.exception())
  
      return log_it
  