code: def get_test_pair_corpus(key="de-en"):
      if key == "de-en":
          return [
              os.path.join(_CURR_DIR, "data", "wmt19-test-de-en.de"),
              os.path.join(_CURR_DIR, "data", "wmt19-test-de-en.en"),
          ]
      elif key == "zh-en":
          return [
              os.path.join(_CURR_DIR, "data", "wmt19-test-zh-en.zh"),
              os.path.join(_CURR_DIR, "data", "wmt19-test-zh-en.en"),
          ]
      else:
          raise NotImplementedError
  
file_path: gluon-nlp/tests/process_cli/test_learn_apply_subword.py
imports: import os
  import pytest
  import tempfile
  from gluonnlp.cli.process import learn_subword, apply_subword
  from gluonnlp.data import tokenizers
label_desc: Use image node_id 1 for calling a global function with example usage: get_test_pair_corpus(key) and returns: list, list