code: def test_cublasXtSgemm(self):
      a = np.random.rand(4, 4).astype(np.float32)
      b = np.random.rand(4, 4).astype(np.float32)
      c = np.zeros((4, 4), np.float32)
      cublasxt.cublasXtSgemm(
          self.handle,
          "N",
          "N",
          4,
          4,
          4,
          np.float32(1.0),
          a.ctypes.data,
          4,
          b.ctypes.data,
          4,
          np.float32(0.0),
          c.ctypes.data,
          4,
      )
      np.allclose(np.dot(b.T, a.T).T, c)
  
file_path: scikit-cuda/tests/test_cublasxt.py
imports: from unittest import main, makeSuite, TestCase, TestSuite
  import numpy
  import pycuda.driver
  from pycuda.tools import clear_context_caches, make_default_context
  import skcuda.cublasxt
  import skcuda.misc
label_desc: Use image node_id 4 for calling the test_cublasxt obj's underlying member method code with example usage: obj.test_cublasXtSgemm() without return types