/usr/lib/python2.7/dist-packages/IPython/external/ is in ipython 2.3.0-2.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/python2.7/dist-packages/IPython/external/__init__.py
/usr/lib/python2.7/dist-packages/IPython/external/appnope/
/usr/lib/python2.7/dist-packages/IPython/external/appnope/__init__.py
/usr/lib/python2.7/dist-packages/IPython/external/appnope/_dummy.py
/usr/lib/python2.7/dist-packages/IPython/external/appnope/_nope.py
/usr/lib/python2.7/dist-packages/IPython/external/decorator/
/usr/lib/python2.7/dist-packages/IPython/external/decorator/__init__.py
/usr/lib/python2.7/dist-packages/IPython/external/decorators/
/usr/lib/python2.7/dist-packages/IPython/external/decorators/__init__.py
/usr/lib/python2.7/dist-packages/IPython/external/decorators/_decorators.py
/usr/lib/python2.7/dist-packages/IPython/external/decorators/_numpy_testing_noseclasses.py
/usr/lib/python2.7/dist-packages/IPython/external/decorators/_numpy_testing_utils.py
/usr/lib/python2.7/dist-packages/IPython/external/jsonpointer/
/usr/lib/python2.7/dist-packages/IPython/external/jsonpointer/__init__.py
/usr/lib/python2.7/dist-packages/IPython/external/jsonpointer/_jsonpointer.py
/usr/lib/python2.7/dist-packages/IPython/external/jsonschema/
/usr/lib/python2.7/dist-packages/IPython/external/jsonschema/__init__.py
/usr/lib/python2.7/dist-packages/IPython/external/jsonschema/_jsonschema.py
/usr/lib/python2.7/dist-packages/IPython/external/mathjax.py
/usr/lib/python2.7/dist-packages/IPython/external/path/
/usr/lib/python2.7/dist-packages/IPython/external/path/__init__.py
/usr/lib/python2.7/dist-packages/IPython/external/path/_path.py
/usr/lib/python2.7/dist-packages/IPython/external/pexpect/
/usr/lib/python2.7/dist-packages/IPython/external/pexpect/__init__.py
/usr/lib/python2.7/dist-packages/IPython/external/qt.py
/usr/lib/python2.7/dist-packages/IPython/external/qt_for_kernel.py
/usr/lib/python2.7/dist-packages/IPython/external/qt_loaders.py
/usr/lib/python2.7/dist-packages/IPython/external/simplegeneric/
/usr/lib/python2.7/dist-packages/IPython/external/simplegeneric/__init__.py
/usr/lib/python2.7/dist-packages/IPython/external/ssh/
/usr/lib/python2.7/dist-packages/IPython/external/ssh/__init__.py
/usr/lib/python2.7/dist-packages/IPython/external/ssh/forward.py
/usr/lib/python2.7/dist-packages/IPython/external/ssh/tunnel.py