drafttopic model building error 2020.01.10.8.00

2020-01-10 16:24:44,957 DEBUG:drafttopic.utilities.fetch_draft_text -- Write Dimitrios Ferfelis with 1815 chars of text.
./utility extract_from_text \
	drafttopic.feature_lists.wordvectors.drafttopic \
	--input=datasets/enwiki.balanced_article_sample.w_draft_text.json \
	--output=datasets/enwiki.balanced_article_sample.w_draft_cache.json \
	--verbose
/srv/home/kevinbazira/venv/3.5/lib/python3.5/site-packages/smart_open/smart_open_lib.py:402: UserWarning: This function is deprecated, use smart_open.open instead. See the migration notes for details: https://github.com/RaRe-Technologies/smart_open/blob/master/README.rst#migrating-to-the-new-open-function
  'See the migration notes for details: %s' % _MIGRATION_NOTES_URL
.....multiprocessing.pool.RemoteTraceback:
"""
Traceback (most recent call last):
  File "/srv/home/kevinbazira/venv/3.5/lib/python3.5/site-packages/revscoring/dependencies/functions.py", line 244, in _solve
    value = dependent(*args)
  File "/srv/home/kevinbazira/venv/3.5/lib/python3.5/site-packages/revscoring/features/feature.py", line 41, in __call__
    value = super().__call__(*args, **kwargs)
  File "/srv/home/kevinbazira/venv/3.5/lib/python3.5/site-packages/revscoring/dependencies/dependent.py", line 54, in __call__
    return self.process(*args, **kwargs)
  File "/srv/home/kevinbazira/venv/3.5/lib/python3.5/site-packages/revscoring/features/feature.py", line 221, in operate
    return left / right
ZeroDivisionError: float division by zero

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/lib/python3.5/multiprocessing/pool.py", line 119, in worker
    result = (True, func(*args, **kwds))
  File "/srv/home/kevinbazira/pr/drafttopic/drafttopic/utilities/extract_from_text.py", line 112, in extract_and_cache
    cache=observation.get('cache'))
  File "/srv/home/kevinbazira/pr/drafttopic/drafttopic/utilities/extract_from_text.py", line 140, in extract_from_text
    return list(solve(dependents, cache=cache, context=context))
  File "/srv/home/kevinbazira/venv/3.5/lib/python3.5/site-packages/revscoring/dependencies/functions.py", line 269, in _solve_many
    profile=profile)
  File "/srv/home/kevinbazira/venv/3.5/lib/python3.5/site-packages/revscoring/dependencies/functions.py", line 258, in _solve
    formatted_exception)
revscoring.errors.CaughtDependencyError: ZeroDivisionError: Failed to process feature.(len(<datasource.wikitext.revision.tokens_matching(\b(she|her|hers)\b)>) / (len(<datasource.wikitext.revision.tokens_matching(\b(she|her|hers)\b)>) + len(<datasource.wikitext.revision.tokens_matching(\b(he|him|his)\b)>))): float division by zero
Traceback (most recent call last):
  File "/srv/home/kevinbazira/venv/3.5/lib/python3.5/site-packages/revscoring/dependencies/functions.py", line 244, in _solve
    value = dependent(*args)
  File "/srv/home/kevinbazira/venv/3.5/lib/python3.5/site-packages/revscoring/features/feature.py", line 41, in __call__
    value = super().__call__(*args, **kwargs)
  File "/srv/home/kevinbazira/venv/3.5/lib/python3.5/site-packages/revscoring/dependencies/dependent.py", line 54, in __call__
    return self.process(*args, **kwargs)
  File "/srv/home/kevinbazira/venv/3.5/lib/python3.5/site-packages/revscoring/features/feature.py", line 221, in operate
    return left / right
ZeroDivisionError: float division by zero

"""

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "./utility", line 4, in <module>
    drafttopic.main()
  File "/srv/home/kevinbazira/pr/drafttopic/drafttopic/drafttopic.py", line 57, in main
    module.main(sys.argv[2:])
  File "/srv/home/kevinbazira/pr/drafttopic/drafttopic/utilities/extract_from_text.py", line 76, in main
    run(observations, dependents, output, extractors, verbose)
  File "/srv/home/kevinbazira/pr/drafttopic/drafttopic/utilities/extract_from_text.py", line 85, in run
    extractor.extract_and_cache, labelings):
  File "/usr/lib/python3.5/multiprocessing/pool.py", line 695, in next
    raise value
revscoring.errors.CaughtDependencyError: ZeroDivisionError: Failed to process feature.(len(<datasource.wikitext.revision.tokens_matching(\b(she|her|hers)\b)>) / (len(<datasource.wikitext.revision.tokens_matching(\b(she|her|hers)\b)>) + len(<datasource.wikitext.revision.tokens_matching(\b(he|him|his)\b)>))): float division by zero
Traceback (most recent call last):
  File "/srv/home/kevinbazira/venv/3.5/lib/python3.5/site-packages/revscoring/dependencies/functions.py", line 244, in _solve
    value = dependent(*args)
  File "/srv/home/kevinbazira/venv/3.5/lib/python3.5/site-packages/revscoring/features/feature.py", line 41, in __call__
    value = super().__call__(*args, **kwargs)
  File "/srv/home/kevinbazira/venv/3.5/lib/python3.5/site-packages/revscoring/dependencies/dependent.py", line 54, in __call__
    return self.process(*args, **kwargs)
  File "/srv/home/kevinbazira/venv/3.5/lib/python3.5/site-packages/revscoring/features/feature.py", line 221, in operate
    return left / right
ZeroDivisionError: float division by zero

Makefile:64: recipe for target 'datasets/enwiki.balanced_article_sample.w_draft_cache.json' failed
make: *** [datasets/enwiki.balanced_article_sample.w_draft_cache.json] Error 1
make: *** Deleting file 'datasets/enwiki.balanced_article_sample.w_draft_cache.json'