code: def sub_column(string: str, c: int, c_size: int, title: str) -> str:
      r"""
      对传入的字符串进行截断，方便在命令行中显示。
  
      :param string: 要被截断的字符串；
      :param c: 命令行列数；
      :param c_size: :class:`~fastNLP.core.Instance` 或 :class:`~fastNLP.core.DataSet` 的 ``field`` 数目；
      :param title: 列名；
      :return: 对一个过长的列进行截断的结果；
      """
      avg = max(int(c / c_size / 2), len(title))
      string = str(string)
      res = ""
      counter = 0
      for char in string:
          if ord(char) > 255:
              counter += 2
          else:
              counter += 1
          res += char
          if counter > avg:
              res = res + "..."
              break
      return res
  
imports: import functools
  import inspect
  from inspect import Parameter
  import dataclasses
  from dataclasses import is_dataclass
  from copy import deepcopy
  from collections import defaultdict, OrderedDict
  from typing import Callable, List, Any, Dict, AnyStr, Union, Mapping, Sequence
  from typing import Tuple, Optional
  from time import sleep
  import os
  from contextlib import contextmanager
  from functools import wraps
  from prettytable import PrettyTable
  from pathlib import Path
  from fastNLP.core.log import logger
label_desc: Use image node_id 13 for calling a global function with example usage: sub_column(string, c, c_size, title) and returns: res