code: def __test_ndim(self):
      self.parse_opts("int, 2")
      self.non_parse(ERR_BUF_NDIM, "int, 'a'")
      self.non_parse(ERR_BUF_NDIM, "int, -34")
  
imports: from Cython.TestUtils import CythonTest
  import Cython.Compiler.Errors
  from Cython.Compiler.Nodes import *
  from Cython.Compiler.ParseTreeTransforms import *
  from Cython.Compiler.Buffer import *
label_desc: Use image node_id 6 for calling the TestBufferOptions obj's underlying member method code with example usage: obj.__test_ndim() without return types