code: def test_raw_load_simple_ascii(self):
      ply_file = "\n".join(
          [
              "ply",
              "format ascii 1.0",
              "comment made by Greg Turk",
              "comment this file is a cube",
              "element vertex 8",
              "property float x",
              "property float y",
              "property float z",
              "element face 6",
              "property list uchar int vertex_index",
              "element irregular_list 3",
              "property list uchar int vertex_index",
              "end_header",
              "0 0 0",
              "0 0 1",
              "0 1 1",
              "0 1 0",
              "1 0 0",
              "1 0 1",
              "1 1 1",
              "1 1 0",
              "4 0 1 2 3",
              "4 7 6 5 4",
              "4 0 4 5 1",
              "4 1 5 6 2",
              "4 2 6 7 3",
              "4 3 7 4 0",  # end of faces
              "4 0 1 2 3",
              "4 7 6 5 4",
              "3 4 5 1",
          ]
      )
      for line_ending in [None, "\n", "\r\n"]:
          if line_ending is None:
              stream = StringIO(ply_file)
          else:
              byte_file = ply_file.encode("ascii")
              if line_ending == "\r\n":
                  byte_file = byte_file.replace(b"\n", b"\r\n")
              stream = BytesIO(byte_file)
          header, data = _load_ply_raw(stream)
          self.assertTrue(header.ascii)
          self.assertEqual(len(data), 3)
          self.assertTupleEqual(data["face"].shape, (6, 4))
          self.assertClose([0, 1, 2, 3], data["face"][0])
          self.assertClose([3, 7, 4, 0], data["face"][5])
          [vertex0] = data["vertex"]
          self.assertTupleEqual(vertex0.shape, (8, 3))
          irregular = data["irregular_list"]
          self.assertEqual(len(irregular), 3)
          self.assertEqual(type(irregular), list)
          [x] = irregular[0]
          self.assertClose(x, [0, 1, 2, 3])
          [x] = irregular[1]
          self.assertClose(x, [7, 6, 5, 4])
          [x] = irregular[2]
          self.assertClose(x, [4, 5, 1])
  
imports: import itertools
  import struct
  import unittest
  from io import BytesIO, StringIO
  from tempfile import NamedTemporaryFile, TemporaryFile
  import numpy
  import pytorch3d.io.ply_io
  import torch
  from iopath.common.file_io import PathManager
  from pytorch3d.io import IO
  from pytorch3d.io.ply_io import load_ply, save_ply
  from pytorch3d.renderer.mesh import TexturesVertex
  from pytorch3d.structures import Meshes, Pointclouds
  from pytorch3d.utils import torus
  from .common_testing import get_tests_dir, TestCaseMixin
label_desc: Use image node_id 1 for calling the TestMeshPlyIO obj's underlying member method code with example usage: obj.test_raw_load_simple_ascii() without return types