code: def encode(self, line):
      global bpe
      ids = bpe.encode(line)
      return list(map(str, ids))
  
file_path: fairseq/examples/roberta/multiprocessing_bpe_encoder.py
imports: import argparse
  import contextlib
  import sys
  from collections import Counter
  from multiprocessing import Pool
  from fairseq.data.encoders.gpt2_bpe import get_encoder
label_desc: Use image node_id 3 for calling the MultiprocessingEncoder obj's underlying member method code with example usage: obj.encode(line) and returns: list