docstr: x.__len__() <==> len(x)
docstr_tok: ["x.__len__","(",")","<","==",">","len","(","x",")"]
code: def __len__(self):
      """x.__len__() <==> len(x)"""
      return len(self._vertices_list)
  
imports: from __future__ import division
  import math
  import numpy
  from ...gloo import Texture2D, VertexBuffer, IndexBuffer
  from .util import dtype_reduce
  from .array_list import ArrayList
label_desc: Use image node_id 2 for calling the BaseCollection obj's underlying member method code with example usage: obj.__len__() and returns: len