class_docstr: Description2Code for python problem.
class_docstr_tok: ["Description2Code","for","python","problem","."]
docstr: Simple tab to space replacement.
docstr_tok: ["Simple","tab","to","space","replacement","."]
code: def preprocess_target(self, target):
      """Simple tab to space replacement."""
      return target.replace("\t", "    ")
  
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 2 for calling the ProgrammingDesc2codePy obj's underlying member method code with example usage: obj.preprocess_target(target) and returns: target