  
  
  class MultipleChoiceField(ChoiceField):
      default_error_messages = {
          'invalid_choice': _('`{input}` is not a valid choice.'),
          'not_a_list': _('Expected a list of items but got type `{input_type}`.')
      }
      default_empty_html = []
  
      def get_value(self, dictionary):
          # We override the default field access in order to support
 
</s> remove         'not_a_list': _('Expected a list of items but got type `{input_type}`.')
 </s> add         'not_a_list': _('Expected a list of items but got type "{input_type}".') </s> remove         'not_a_list': _('Expected a list of items but got type `{input_type}`.')
 </s> add         'not_a_list': _('Expected a list of items but got type "{input_type}".') </s> remove         'invalid_choice': _('`{input}` is not a valid choice.')
 </s> add         'invalid_choice': _('"{input}" is not a valid choice.') </s> remove         'invalid': _('`{input}` is not a valid boolean.')
 </s> add         'invalid': _('"{input}" is not a valid boolean.') </s> remove # raise serializers.ValidationError("Value was invalid")
 </s> add # raise serializers.ValidationError('Value was invalid')
        'invalid_choice': _('"{input}" is not a valid choice.'),
        'not_a_list': _('Expected a list of items but got type "{input_type}".')
  
  
  class MultipleChoiceField(ChoiceField):
      default_error_messages = {
        'invalid_choice': _('"{input}" is not a valid choice.'),
        'not_a_list': _('Expected a list of items but got type "{input_type}".')
        'invalid_choice': _('"{input}" is not a valid choice.'),
        'not_a_list': _('Expected a list of items but got type "{input_type}".')
      }
      default_empty_html = []
  
      def get_value(self, dictionary):
          # We override the default field access in order to support
keep keep keep keep replace replace keep keep keep keep keep
 swap backticks for double quotes 
rest_framework/fields.py