code: def _generate_tokens_from_c_tokenizer(source):
      """Tokenize a source reading Python code as unicode strings using the internal C tokenizer"""
      import _tokenize as c_tokenizer
  
      for info in c_tokenizer.TokenizerIter(source):
          (
              tok,
              type,
              lineno,
              end_lineno,
              col_off,
              end_col_off,
              line,
          ) = info
          yield TokenInfo(
              type,
              tok,
              (lineno, col_off),
              (end_lineno, end_col_off),
              line,
          )
  
imports: from builtins import open
  from codecs import lookup, BOM_UTF8
  import collections
  import functools
  from io import TextIOWrapper
  import itertools
  import re
  import sys
  from token import *
  from token import EXACT_TOKEN_TYPES
  import token
label_desc: Use image node_id 14 for calling a global function with example usage: _generate_tokens_from_c_tokenizer(source) without return types