docs: def charts_slug_get(self, slug, **kwargs):
          """
          Chart
          A Chart is chosen by Pollster editors. One example is \"Obama job approval - Democrats\". It is always based upon a single Question.  Users should strongly consider basing their analysis on Questions instead. Charts are derived data; Pollster editors publish them and change them as editorial priorities change. 
  
          This method makes a synchronous HTTP request by default. To make an
          asynchronous HTTP request, please define a `callback` function
          to be invoked when receiving the response.
          >>> def callback_function(response):
          >>>     pprint(response)
          >>>
          >>> thread = api.charts_slug_get(slug, callback=callback_function)
  
          :param callback function: The callback function
              for asynchronous request. (optional)
          :param str slug: Unique identifier for a Chart (required)
          :return: Chart
                   If the method is called asynchronously,
                   returns the request thread.
          """
          kwargs['_return_http_data_only'] = True
          if kwargs.get('callback'):
              return self.charts_slug_get_with_http_info(slug, **kwargs)
          else:
              (data) = self.charts_slug_get_with_http_info(slug, **kwargs)
              return data