code: def test_init_not_allowed_dtype(self):
      for dtype in (np.uint32, np.int32, np.float64):
          # with self.assertRaises(TypeError):
          #    V = VertexBuffer(dtype=dtype)
          self.assertRaises(TypeError, VertexBuffer, dtype=dtype)
  
imports: import unittest
  import numpy
  from vispy.testing import run_tests_if_main
  from vispy.gloo.buffer import Buffer, DataBuffer, DataBufferView, VertexBuffer, IndexBuffer
label_desc: Use image node_id 2 for calling the VertexBufferTest obj's underlying member method code with example usage: obj.test_init_not_allowed_dtype() without return types