class_docstr: Description2Code for C++ problem.
class_docstr_tok: ["Description2Code","for","C++","problem","."]
code: def pb_constants(self):
      return PB_CPP
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  import collections
  import os
  import random
  import re
  import zipfile
  from tensor2tensor.data_generators import generator_utils
  from tensor2tensor.data_generators import problem
  from tensor2tensor.data_generators import text_encoder
  from tensor2tensor.data_generators import text_problems
  from tensor2tensor.utils import registry
  import tensorflow.compat.v1
label_desc: Use image node_id 1 for calling the ProgrammingDesc2codeCpp obj's underlying member method code with example usage: obj.pb_constants() and returns: PB_CPP