/usr/lib/python2.7/dist-packages/ipywidgets/_version.py is in python-ipywidgets 5.2.2-3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 | version_info = (5, 2, 2)
__version__ = '.'.join(map(str, version_info))
__frontend_version__ = '~1.2.0'
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