code: def _dir_prod(a, b):
      """Calculates the direct product of two Tensors."""
      return tf.tensordot(a, b, ([], []))
  
imports: from absl.testing import parameterized
  import numpy
  import tensorflow.compat.v2
  import tf_quant_finance
  from tensorflow.python.framework import test_util
label_desc: Use image node_id 8 for calling a global function with example usage: _dir_prod(a, b) and returns: tf