class_docstr: A tree looked like (Foo
class_docstr_tok: ["A","tree","looked","like","(","Foo"]
code: def __init__(self, line_num):
      super().__init__(
          "Found an unfinished tree (missing close brackets).  Tree started on line %d"
          % line_num
      )
      self.line_num = line_num
  
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 1 to create a new UnclosedTreeError object from inherited base classes: ValueError with example: obj = UnclosedTreeError(line_num)