code: def read_wiki_file(filename):
      """
      Read the text from a wiki file as a list of paragraphs.
  
      Each <doc> </doc> is its own item in the list.
      Lines are separated by \n\n to give hints to the stanza tokenizer.
      The first line after <doc> is skipped as it is usually the document title.
      """
      with open(filename) as fin:
          lines = fin.readlines()
      docs = []
      current_doc = []
      line_iterator = iter(lines)
      line = next(line_iterator, None)
      while line is not None:
          if line.startswith("<doc"):
              # skip the next line, as it is usually the title
              line = next(line_iterator, None)
          elif line.startswith("</doc"):
              if current_doc:
                  if len(current_doc) > 2:
                      # a lot of very short documents are links to related documents
                      # a single wikipedia can have tens of thousands of useless almost-duplicates
                      docs.append("\n\n".join(current_doc))
                  current_doc = []
          else:
              # not the start or end of a doc
              # hopefully this is valid text
              line = line.replace("()", " ")
              line = line.replace("( )", " ")
              line = line.strip()
              if line.find("&lt;") >= 0 or line.find("&gt;") >= 0:
                  line = ""
              if line:
                  current_doc.append(line)
          line = next(line_iterator, None)
  
      if current_doc:
          docs.append("\n\n".join(current_doc))
      return docs
  
file_path: stanza/stanza/utils/datasets/constituency/selftrain_wiki.py
imports: import argparse
  from collections import deque
  import glob
  import os
  import random
  from stanza.models.common.foundation_cache import FoundationCache
  from stanza.utils.datasets.constituency import selftrain
  from stanza.utils.get_tqdm import get_tqdm
label_desc: Use image node_id 3 for calling a global function with example usage: read_wiki_file(filename) and returns: docs