code: def _cn_char_split(sent):
      return [chars for chars in sent]
  
file_path: fastNLP/fastNLP/io/pipe/utils.py
imports: from typing import List
  from ...core.vocabulary import Vocabulary
  from fastNLP.core.log import logger
  from pkg_resources import parse_version
label_desc: Use image node_id 4 for calling a global function with example usage: _cn_char_split(sent) and returns: unknown