code: def test_dlamch(self):
      for c in [
          b"e",
          b"s",
          b"b",
          b"p",
          b"n",
          b"r",
          b"m",
          b"u",
          b"l",
          b"o",
      ]:
          assert_allclose(
              cython_lapack._test_dlamch(c), lapack.dlamch(c)
          )
  
imports: from numpy.testing import assert_allclose
  from scipy.linalg import cython_lapack
  from scipy.linalg import lapack
label_desc: Use image node_id 2 for calling the TestLamch obj's underlying member method code with example usage: obj.test_dlamch() without return types