code: def setUp(self):
      self._msg = array_ops.placeholder(dtype=dtypes.string)
      self._encoded_f = string_ops.encode_base64(self._msg, pad=False)
      self._decoded_f = string_ops.decode_base64(self._encoded_f)
      self._encoded_t = string_ops.encode_base64(self._msg, pad=True)
      self._decoded_t = string_ops.decode_base64(self._encoded_t)
  
file_path: tensorflow-upstream/tensorflow/python/kernel_tests/strings_ops/base64_ops_test.py
imports: import base64
  import numpy
  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.ops import string_ops
  from tensorflow.python.platform import test
label_desc: Use image node_id 1 for calling the Base64OpsTest obj's underlying member method code with example usage: obj.setUp() without return types