class_docstr: Tokenize a string into individual characters.  If this functionality
  is ever required directly, use ``for char in string``.
code: def tokenize(self, s):
      return list(s)
  
file_path: nltk/nltk/tokenize/simple.py
imports: from nltk.tokenize.api import StringTokenizer, TokenizerI
  from nltk.tokenize.util import regexp_span_tokenize, string_span_tokenize
label_desc: Use image node_id 1 for calling the CharTokenizer obj's underlying member method code with example usage: obj.tokenize(s) and returns: list