code: def test_transcode_utf8_simple(self):
      strings = [[b"a", b"abc"], [b"ABC", b"DEF"]]
  
      with self.cached_session() as sess:
          outputs = string_ops.unicode_transcode(
              strings,
              input_encoding="UTF-8",
              output_encoding="UTF-8",
              errors="replace",
              replacement_char=ord(" "),
              replace_control_characters=False,
          )
          values = self.evaluate(outputs)
          self.assertAllEqual(values, strings)
  
          outputs = string_ops.unicode_transcode(
              strings,
              input_encoding="ISO-8859-1",
              output_encoding="UTF-8",
              errors="replace",
              replacement_char=ord(" "),
              replace_control_characters=False,
          )
          values = self.evaluate(outputs)
          self.assertAllEqual(values, strings)
  
          outputs = string_ops.unicode_transcode(
              strings,
              input_encoding="US-ASCII",
              output_encoding="UTF-8",
              errors="replace",
              replacement_char=ord(" "),
              replace_control_characters=False,
          )
          values = self.evaluate(outputs)
          self.assertAllEqual(values, strings)
  
imports: from absl.testing import parameterized
  from tensorflow.python.framework import constant_op
  from tensorflow.python.framework import dtypes
  from tensorflow.python.framework import test_util
  from tensorflow.python.ops import string_ops
  from tensorflow.python.platform import test
label_desc: Use image node_id 1 for calling the UnicodeTranscodeOpTest obj's underlying member method code with example usage: obj.test_transcode_utf8_simple() without return types