old_contents: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  from __future__ import unicode_literals
  
  from typing import Optional, Text, Dict, Any, List
  
  from rasa_core import utils
  from rasa_core.policies import PolicyEnsemble
  
  
  def load(config_file):
      # type: (Optional[Text], Dict[Text, Any], int) -> List[Policy]
      """Load policy data stored in the specified file. fallback_args and
      max_history are typically command line arguments. They take precedence
      over the arguments specified in the config yaml.
      """
  
      config_data = utils.read_yaml_file(config_file)
  
      return PolicyEnsemble.from_dict(config_data)
  
new_contents: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  from __future__ import unicode_literals
  
  from typing import Optional, Text, Dict, Any, List
  
  from rasa_core import utils
  from rasa_core.policies import PolicyEnsemble
  
  
  def load(config_file):
      # type: (Optional[Text], Dict[Text, Any], int) -> List[Policy]
      """Load policy data stored in the specified file. fallback_args and
      max_history are typically command line arguments. They take precedence
      over the arguments specified in the config yaml.
      """
      if config_file:
          config_data = utils.read_yaml_file(config_file)
      else:
          raise ValueError("You have to provide a config file")
  
      return PolicyEnsemble.from_dict(config_data)
  
subject: raise error if no file is provided