/usr/share/pyshared/IPython/external/ is in ipython 0.13.1-2+deb7u1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/pyshared/IPython/external/__init__.py
/usr/share/pyshared/IPython/external/argparse/
/usr/share/pyshared/IPython/external/argparse/__init__.py
/usr/share/pyshared/IPython/external/decorator/
/usr/share/pyshared/IPython/external/decorator/__init__.py
/usr/share/pyshared/IPython/external/decorators/
/usr/share/pyshared/IPython/external/decorators/__init__.py
/usr/share/pyshared/IPython/external/decorators/_decorators.py
/usr/share/pyshared/IPython/external/decorators/_numpy_testing_noseclasses.py
/usr/share/pyshared/IPython/external/decorators/_numpy_testing_utils.py
/usr/share/pyshared/IPython/external/mathjax.py
/usr/share/pyshared/IPython/external/path/
/usr/share/pyshared/IPython/external/path/__init__.py
/usr/share/pyshared/IPython/external/path/_path.py
/usr/share/pyshared/IPython/external/pexpect/
/usr/share/pyshared/IPython/external/pexpect/__init__.py
/usr/share/pyshared/IPython/external/qt.py
/usr/share/pyshared/IPython/external/qt_for_kernel.py
/usr/share/pyshared/IPython/external/simplegeneric/
/usr/share/pyshared/IPython/external/simplegeneric/__init__.py
/usr/share/pyshared/IPython/external/ssh/
/usr/share/pyshared/IPython/external/ssh/__init__.py
/usr/share/pyshared/IPython/external/ssh/forward.py
/usr/share/pyshared/IPython/external/ssh/tunnel.py