code: def set_vertices(self, verts=None, indexed=None, reset_normals=True):
          
          if indexed is None:
              if verts is not None:
                  self._vertices = verts
              self._vertices_indexed_by_faces = None
          elif indexed == 'faces':
              self._vertices = None
              if verts is not None:
                  self._vertices_indexed_by_faces = verts
          else:
              raise Exception("Invalid indexing mode. Accepts: None, 'faces'")
  
          if reset_normals:
              self.reset_normals()
docs: Set the mesh vertices
  
          Parameters
          ----------
          verts : ndarray | None
              The array (Nv, 3) of vertex coordinates.
          indexed : str | None
              If indexed=='faces', then the data must have shape (Nf, 3, 3) and
              is assumed to be already indexed as a list of faces. This will
              cause any pre-existing normal vectors to be cleared unless
              reset_normals=False.
          reset_normals : bool
              If True, reset the normals.