text: # coding: utf-8
  #
  # Copyright 2014 The Oppia Authors. All Rights Reserved.
  #
  # 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, softwar
  # 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 extensions.interactions import base
  
  
  class SetInput(base.BaseInteraction):
      """Interaction for input of an unordered set of strings."""
  
      name = 'Set'
      category = 'Mathematics'
      description = 'Allows learners to enter an unordered set of strings.'
      display_mode = base.DISPLAY_MODE_SUPPLEMENTAL
      _dependency_ids = []
      _handlers = [{
          'name': 'submit', 'obj_type': 'SetOfUnicodeString'}]
  
      # NB: There used to be a UnicodeString-typed parameter here called
      # 'element_type'. This has since been removed.
      _customization_arg_specs = []
  