      def get_context(self, data, request):
          return {
              'document': data,
              'langs': self.languages,
              'lang_htmls': ["rest_framework/docs/langs/%s.html" % l for l in self.languages],
              'lang_intro_htmls': ["rest_framework/docs/langs/%s-intro.html" % l for l in self.languages],
              'code_style': pygments_css(self.code_style),
              'request': request
          }
  
      def render(self, data, accepted_media_type=None, renderer_context=None):
 
</s> remove         'app_label': model._meta.app_label,
 </s> add  </s> remove             expected = ['Must be a valid boolean.'.format(input_value)]
 </s> add             expected = ['Must be a valid boolean.'] </s> remove pycodestyle==2.5.0
 </s> add pycodestyle==2.6.0 </s> remove flake8==3.7.9
 </s> add flake8==3.8.3
            'lang_htmls': ["rest_framework/docs/langs/%s.html" % language for language in self.languages],
            'lang_intro_htmls': ["rest_framework/docs/langs/%s-intro.html" % language for language in self.languages],
      def get_context(self, data, request):
          return {
              'document': data,
              'langs': self.languages,
            'lang_htmls': ["rest_framework/docs/langs/%s.html" % language for language in self.languages],
            'lang_intro_htmls': ["rest_framework/docs/langs/%s-intro.html" % language for language in self.languages],
            'lang_htmls': ["rest_framework/docs/langs/%s.html" % language for language in self.languages],
            'lang_intro_htmls': ["rest_framework/docs/langs/%s-intro.html" % language for language in self.languages],
              'code_style': pygments_css(self.code_style),
              'request': request
          }
  
      def render(self, data, accepted_media_type=None, renderer_context=None):
keep keep keep keep replace replace keep keep keep keep keep
 Bump flake8 to 3.8.3 (#7521) 
rest_framework/renderers.py