new_contents: # coding: utf8
  from __future__ import unicode_literals
  
  from ...compat import json_dumps, path2str
  from ...util import prints
  from ...gold import iob_to_biluo
  
  
  def conll_ner2json(input_path, output_path, n_sents=10, use_morphology=False):
      """
      Convert files in the CoNLL-2003 NER format into JSON format for use with train cli.
      """
      docs = read_conll_ner(input_path)
  
      output_filename = input_path.parts[-1].replace(".conll", "") + ".json"
      output_filename = input_path.parts[-1].replace(".conll", "") + ".json"
      output_file = output_path / output_filename
      with output_file.open('w', encoding='utf-8') as f:
          f.write(json_dumps(docs))
      prints("Created %d documents" % len(docs),
             title="Generated output file %s" % path2str(output_file))
  
  
  def read_conll_ner(input_path):
      text = input_path.open('r', encoding='utf-8').read()
      i = 0
      delimit_docs = '-DOCSTART- -X- O O'
      output_docs = []
      for doc in text.strip().split(delimit_docs):
          doc = doc.strip()
          if not doc:
              continue
          output_doc = []
          for sent in doc.split('\n\n'):
              sent = sent.strip()
              if not sent:
                  continue
              lines = [line.strip() for line in sent.split('\n') if line.strip()]
              words, tags, chunks, iob_ents = zip(*[line.split() for line in lines])
              biluo_ents = iob_to_biluo(iob_ents)
              output_doc.append({'tokens': [
                  {'orth': w, 'tag': tag, 'ner': ent} for (w, tag, ent) in
                  zip(words, tags, biluo_ents)
              ]})
          output_docs.append({
              'id': len(output_docs),
              'paragraphs': [{'sentences': output_doc}]
          })
          output_doc = []
      return output_docs
  
subject: Add conll_ner2json converter