code: def _tokenize_by_char(line: str) -> str:
      return " ".join(list(line.strip()))
  
file_path: vizseq/vizseq/_data/tokenizers.py
imports: from enum import Enum
  from sacrebleu.tokenizers import Tokenizer13a, TokenizerV14International, TokenizerZh
label_desc: Use image node_id 1 for calling a global function with example usage: _tokenize_by_char(line) and returns: str