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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def get_variables_path(export_dir):
 """Returns the path for storing variables checkpoints."""

  return os.path.join(
      tf.compat.as_bytes(export_dir),
      tf.compat.as_bytes(tf_v1.saved_model.constants.VARIABLES_DIRECTORY),
      tf.compat.as_bytes(tf_v1.saved_model.constants.VARIABLES_FILENAME))