code: def __init__(self, string):
      self.istext = isinstance(string, str)
      self.string = string
      if not self.istext:
          string = str(string, "latin1")
      self.decoded_string = string
      self.index = 0
      self.next = None
      self.__next()
  
imports: from ._constants import *
label_desc: Use image node_id 1 to create a new Tokenizer object  with example: obj = Tokenizer(string)