code: def __enter__(self):
      # TODO: use the file_size instead of counting the lines
      # file_size = Path(self.filename).stat().st_size
      with open(self.filename) as fin:
          num_lines = sum(1 for _ in fin)
  
      self.file_obj = open(self.filename)
      if num_lines > 1000:
          self.line_iterator = iter(
              tqdm(self.file_obj, total=num_lines)
          )
      else:
          self.line_iterator = iter(self.file_obj)
      return self
  
imports: from collections import deque
  import logging
  import os
  import re
  from stanza.models.constituency.parse_tree import Tree
  from stanza.utils.get_tqdm import get_tqdm
label_desc: Use image node_id 2 for calling the FileTokenIterator obj's underlying member method code with example usage: obj.__enter__() and returns: self