code: def load_pairs(raw_data, split, direction):
      src, tgt = direction.split("-")
      src_f = f"{raw_data}/{split}.{direction}.{src}"
      tgt_f = f"{raw_data}/{split}.{direction}.{tgt}"
      if tgt != "en_XX":
          src_f, tgt_f = tgt_f, src_f
      if os.path.exists(src_f) and os.path.exists(tgt_f):
          return list(
              zip(
                  open(src_f).read().splitlines(),
                  open(tgt_f).read().splitlines(),
              )
          )
      else:
          return []
  
file_path: fairseq/examples/multilingual/data_scripts/remove_valid_test_in_train.py
imports: import os, sys
  import glob, itertools
  import pandas
label_desc: Use image node_id 12 for calling a global function with example usage: load_pairs(raw_data, split, direction) and returns: list, list