NLTK -- LookupError:Resource punkt not found.

Failure:

LookupError:
**********************************************************************
Resource punkt not found.
Please use the NLTK Downloader to obtain the resource:

>>> import nltk
>>> nltk.download('punkt')

For more information see: https://www.nltk.org/data.html

Attempted to load tokenizers/punkt/PY3/english.pickle

Searched in:
- '/home/me/nltk_data'
- '/home/me/anaconda3/nltk_data'
- '/home/me/anaconda3/share/nltk_data'
- '/home/me/anaconda3/lib/nltk_data'
- '/usr/share/nltk_data'
- '/usr/local/share/nltk_data'
- '/usr/lib/nltk_data'
- '/usr/local/lib/nltk_data'
- ''
**********************************************************************

Solution:

Move tokenizers out from packages as a whole.