text: """Fields for outputting Constant Values in your serializers.
  """
  from __future__ import absolute_import, print_function, unicode_literals
  
  from rest_framework import serializers
  
  
  class ConstantField(serializers.Field):
      """Return a Constant in the serializer.
  
      Usage:
          my_field = ConstantField(value='My Value')
  
      Now, in your serializer.data, the value of 'my_field' will be 'My Value'.
      """
  
      def __init__(self, value, *args, **kwargs):
          """Set the value to be returned.
          """
          self._value = value
          kwargs['read_only'] = True
  
          super(ConstantField, self).__init__(*args, **kwargs)
  
      def get_attribute(self, obj):  # pylint: disable=W0613
          """Return the value set by the initializer.
          """
          return self._value
  
      def to_representation(self, value):
          """Output the constant value.
          """
          return value
  