class_docstr: CONLL 2000 POS/chunking task data set (numpy)
  
  Arguments:
      data_path (str): directory containing CONLL2000 files
      sentence_length (int, optional): number of time steps to embed the data.
          None value will not truncate vectors
      max_word_length (int, optional): max word length in characters.
          None value will not truncate vectors
      extract_chars (boolean, optional): Yield Char RNN features.
      lowercase (bool, optional): lower case sentence words
class_docstr_tok: ["CONLL","2000","POS\/chunking","task","data","set","(","numpy",")","Arguments",":","data_path","(","str",")",":","directory","containing","CONLL2000","files","sentence_length","(","int",",","optional",")",":","number","of","time","steps","to","embed","the","data",".","None","value","will","not","truncate","vectors","max_word_length","(","int",",","optional",")",":","max","word","length","in","characters",".","None","value","will","not","truncate","vectors","extract_chars","(","boolean",",","optional",")",":","Yield","Char","RNN","features",".","lowercase","(","bool",",","optional",")",":","lower","case","sentence","words"]
code: def _validate_paths(self, data_path):
      validate_existing_directory(data_path)
      for f in self.dataset_files:
          _f_path = path.join(data_path, self.dataset_files[f])
          validate_existing_filepath(_f_path)
          self.dataset_files[f] = _f_path
  
imports: from __future__ import absolute_import, division, print_function, unicode_literals
  import logging
  import os
  from os import path
  from typing import List
  import numpy
  from nlp_architect.data.utils import DataProcessor, InputExample, read_column_tagged_file
  from nlp_architect.utils.generic import pad_sentences
  from nlp_architect.utils.io import validate_existing_directory, validate_existing_filepath
  from nlp_architect.utils.text import character_vector_generator, read_sequential_tagging_file, word_vector_generator
  from nlp_architect.utils.text import Vocabulary
label_desc: Use image node_id 2 for calling the CONLL2000 obj's underlying member method code with example usage: obj._validate_paths(data_path) without return types