code: def read_langs(corpus_path):
      split_type_file_path = os.path.join(
          corpus_path, "extracted", "all_talks_dev.tsv"
      )
      with io.open(split_type_file_path, "r", encoding="utf8") as fp:
          reader = csv.DictReader(
              fp, delimiter="\t", quoting=csv.QUOTE_NONE
          )
          header = next(reader)
          return [k for k in header.keys() if k != "talk_name"]
  
imports: import itertools
  import os
  import csv
  from collections import defaultdict
  from six.moves import zip
  import io
  import wget
  import sys
  from subprocess import check_call, check_output
label_desc: Use image node_id 2 for calling a global function with example usage: read_langs(corpus_path) and returns: unknown