class_docstr: Base class for Description2Code problems.
class_docstr_tok: ["Base","class","for","Description2Code","problems","."]
docstr: Apply some preprocessing to the target.
  
  For instance, remove space/tabs.
  
  Args:
    target (str): code source content
  
  Returns:
    the pre-processed string content
docstr_tok: ["Apply","some","preprocessing","to","the","target",".","For","instance",",","remove","space\/tabs",".","Args",":","target","(","str",")",":","code","source","content","Returns",":","the","pre-processed","string","content"]
code: def preprocess_target(self, target):
      """Apply some preprocessing to the target.
  
      For instance, remove space/tabs.
  
      Args:
        target (str): code source content
  
      Returns:
        the pre-processed string content
      """
      return target
  
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 6 for calling the Desc2CodeProblem obj's underlying member method code with example usage: obj.preprocess_target(target) and returns: target