code: def _register_babi_problems():
      """It dynamically instantiates a class for each babi subsets-tasks.
  
       @registry.register_problem
       class BabiQaConcatAllTasks_10k(EditSequenceRegexProblem):
         @property
         def babi_task_id(self):
           return "qa0"
         @property
         def babi_subset(self):
          return "en-10k"
  
      It does not put the classes into the global namespace, so to access the class
      we rely on the registry or this module"s REGISTERED_PROBLEMS list.
      It will be available as
  
         registry.problem("babi_qa_concat_all_tasks_10k")
  
      i.e., change camel case to snake case. Numbers are considered lower case
      characters for these purposes.
      """
      for subset, subset_suffix in [("en", "_1k"), ("en-10k", "_10k")]:
          for problem_name, babi_task_id in six.iteritems(
              _problems_to_register()
          ):
              problem_class = type(
                  "BabiQaConcat" + problem_name + subset_suffix,
                  (BabiQaConcat,),
                  {"babi_task_id": babi_task_id, "babi_subset": subset},
              )
              registry.register_problem(problem_class)
              REGISTERED_PROBLEMS.append(problem_class.name)
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  import collections
  import os
  import shutil
  import tarfile
  import requests
  import six
  from tensor2tensor.data_generators import problem
  from tensor2tensor.data_generators import text_encoder
  from tensor2tensor.data_generators import text_problems
  from tensor2tensor.data_generators import tokenizer
  from tensor2tensor.layers import modalities
  from tensor2tensor.utils import metrics
  from tensor2tensor.utils import registry
  import tensorflow.compat.v1
label_desc: Use image node_id 6 for calling a global function with example usage: _register_babi_problems() without return types