/usr/lib/python2.7/dist-packages/Pyste/Exporter.py is in libboost-python1.55-dev 1.55.0-1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/python2.7/dist-packages/Pyste/../../../../share/pyshared/Pyste/Exporter.py