code: def add_polyline(self, path=None, **kwargs):
          
  
          if path:
              if not isinstance(path, list):
                  raise AttributeError('The path is a list of dictionary of'
                                       'latitude and longitudes por path points')
              for i, point in enumerate(path):
                  if not isinstance(point, dict):
                      if isinstance(point, (list, tuple)) and len(point) == 2:
                          path[i] = {'lat': point[0], 'lng': point[1]}
                      else:
                          raise AttributeError(
                              'All points in the path must be dicts'
                              ' of latitudes and longitudes, list or tuple'
                          )
              kwargs['path'] = path
  
          kwargs.setdefault('stroke_color', '#FF0000')
          kwargs.setdefault('stroke_opacity', .8)
          kwargs.setdefault('stroke_weight', 2)
  
          self.polylines.append(kwargs)
docs: Adds a polyline dict to the Map.polylines attribute
  
          The Google Maps API describes a polyline as a "linear overlay of
          connected line segments on the map". The linear paths are defined
          by a list of Latitude and Longitude coordinate pairs, like so:
  
              { 'lat': y, 'lng': x }
  
          with each one being a point of the polyline path.
  
          It accepts a polyline dict representation as well.
  
          Args:
              path (list(dict)): The set of points of the path
  
          .. _Polyline:
              https://developers.google.com/maps/documen
              tation/javascript/reference#Polyline