text: #!/usr/bin/env python3
  
  # Copyright (c) Facebook, Inc. and its affiliates.
  # This source code is licensed under the MIT license found in the
  # LICENSE file in the root directory of this source tree.
  """
  SeeKeR Search Query Tasks.
  """
  import parlai.tasks.wizard_of_internet.agents as woi
  import parlai.utils.logging as logging
  
  import projects.seeker.tasks.mutators  # type: ignore
  
  
  class WoiSearchQueryTeacher(woi.SearchQueryTeacher):
      def __init__(self, opt, shared=None):
          opt['only_last_search_query'] = True
          mutators = '+'.join(
              ['flatten', 'prompt_search_query_mutator', 'skip_retrieval_mutator']
          )
          if opt.get('mutators'):
              mutators = '+'.join([mutators, opt['mutators']])
          logging.warning(f'overriding mutators to {mutators}')
          opt['mutators'] = mutators
          super().__init__(opt, shared)
          self.id = 'WoiSearchQueryTeacher'
  
  
  class SearchQueryTeacher(WoiSearchQueryTeacher):
      pass
  
  
  class DefaultTeacher(SearchQueryTeacher):
      pass
  