code: def _MakeTestTensor(shape, prefix=b"v"):
      """Constructs a string tensor with the specified shape, for testing."""
      if not shape:
          return prefix
      return [
          _MakeTestTensor(
              shape[1:], b"%s%s" % (prefix, ("%s" % i).encode("ascii"))
          )
          for i in range(shape[0])
      ]
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  from absl.testing import parameterized
  from tensorflow.python.framework import constant_op
  from tensorflow.python.framework import dtypes
  from tensorflow.python.framework import errors
  from tensorflow.python.framework import test_util
  from tensorflow.python.ops import array_ops
  from tensorflow.python.platform import test
  from tensorflow_text.python.ops import pointer_ops
label_desc: Use image node_id 1 for calling a global function with example usage: _MakeTestTensor(shape, prefix) and returns: unknown, prefix