/usr/lib/python2.7/dist-packages/nltk/tokenize/ is in python-nltk 3.2.1-2.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/python2.7/dist-packages/nltk/tokenize/__init__.py
/usr/lib/python2.7/dist-packages/nltk/tokenize/api.py
/usr/lib/python2.7/dist-packages/nltk/tokenize/casual.py
/usr/lib/python2.7/dist-packages/nltk/tokenize/mwe.py
/usr/lib/python2.7/dist-packages/nltk/tokenize/punkt.py
/usr/lib/python2.7/dist-packages/nltk/tokenize/regexp.py
/usr/lib/python2.7/dist-packages/nltk/tokenize/sexpr.py
/usr/lib/python2.7/dist-packages/nltk/tokenize/simple.py
/usr/lib/python2.7/dist-packages/nltk/tokenize/stanford.py
/usr/lib/python2.7/dist-packages/nltk/tokenize/stanford_segmenter.py
/usr/lib/python2.7/dist-packages/nltk/tokenize/texttiling.py
/usr/lib/python2.7/dist-packages/nltk/tokenize/treebank.py
/usr/lib/python2.7/dist-packages/nltk/tokenize/util.py