code: def maybe_add_fake_dependencies(lines):
      """
      Possibly add fake dependencies in columns 6 and 7 (counting from 0)
  
      The conllu scripts need the dependencies column filled out, so in
      the case of models we build without dependency data, we need to
      add those fake dependencies in order to use the eval script etc
  
      lines: a list of strings with 10 tab separated columns
        comments are allowed (they will be skipped)
  
      returns: the same strings, but with fake dependencies added
        if columns 6 and 7 were empty
      """
      new_lines = []
      root_idx = None
      first_idx = None
      for line_idx, line in enumerate(lines):
          if line.startswith("#"):
              new_lines.append(line)
              continue
  
          pieces = line.split("\t")
          if MWT_OR_COPY_RE.match(pieces[0]):
              new_lines.append(line)
              continue
  
          token_idx = int(pieces[0])
          if pieces[6] != "_":
              if pieces[6] == "0":
                  root_idx = token_idx
              new_lines.append(line)
          elif token_idx == 1:
              # note that the comments might make this not the first line
              # we keep track of this separately so we can either make this the root,
              # or set this to be the root later
              first_idx = line_idx
              new_lines.append(pieces)
          else:
              pieces[6] = "1"
              pieces[7] = "dep"
              new_lines.append("\t".join(pieces))
      if first_idx is not None:
          if root_idx is None:
              new_lines[first_idx][6] = "0"
              new_lines[first_idx][7] = "root"
          else:
              new_lines[first_idx][6] = str(root_idx)
              new_lines[first_idx][7] = "dep"
          new_lines[first_idx] = "\t".join(new_lines[first_idx])
      return new_lines
  
imports: import argparse
  from enum import Enum
  import glob
  import logging
  import os
  import re
  import subprocess
  import sys
  from stanza.models.common.short_name_to_treebank import canonical_treebank_name
  import stanza.utils.datasets.prepare_tokenizer_data
  import stanza.utils.default_paths
label_desc: Use image node_id 7 for calling a global function with example usage: maybe_add_fake_dependencies(lines) and returns: new_lines