code: def test_save_too_many_colors(self):
      verts = torch.tensor(
          [[0, 0, 0], [0, 0, 1], [0, 1, 0], [1, 0, 0]],
          dtype=torch.float32,
      )
      faces = torch.tensor([[0, 1, 2], [0, 2, 3]])
      vert_colors = torch.rand((4, 7))
      texture_with_seven_colors = TexturesVertex(
          verts_features=[vert_colors]
      )
  
      mesh = Meshes(
          verts=[verts],
          faces=[faces],
          textures=texture_with_seven_colors,
      )
  
      io = IO()
      msg = "Texture will not be saved as it has 7 colors, not 3."
      with NamedTemporaryFile(mode="w", suffix=".ply") as f:
          with self.assertWarnsRegex(UserWarning, msg):
              io.save_mesh(mesh.cuda(), f.name)
  
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 5 for calling the TestMeshPlyIO obj's underlying member method code with example usage: obj.test_save_too_many_colors() without return types