class_docstr: Base class for setting up and testing TextLineDataset.
code: def _lineText(self, f, l):
      return compat.as_bytes("%d: %d" % (f, l))
  
imports: import gzip
  import os
  import pathlib
  import zlib
  from absl.testing import parameterized
  from tensorflow.python.data.kernel_tests import checkpoint_test_base
  from tensorflow.python.data.kernel_tests import test_base
  from tensorflow.python.data.ops import dataset_ops
  from tensorflow.python.data.ops import readers
  from tensorflow.python.framework import combinations
  from tensorflow.python.framework import errors
  from tensorflow.python.platform import test
  from tensorflow.python.util import compat
label_desc: Use image node_id 1 for calling the TextLineDatasetTestBase obj's underlying member method code with example usage: obj._lineText(f, l) and returns: compat