/usr/lib/python2.7/dist-packages/roslaunch/ is in python-roslaunch 1.13.5+ds1-3.
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..
/usr/lib/python2.7/dist-packages/roslaunch/__init__.py
/usr/lib/python2.7/dist-packages/roslaunch/arg_dump.py
/usr/lib/python2.7/dist-packages/roslaunch/child.py
/usr/lib/python2.7/dist-packages/roslaunch/config.py
/usr/lib/python2.7/dist-packages/roslaunch/core.py
/usr/lib/python2.7/dist-packages/roslaunch/depends.py
/usr/lib/python2.7/dist-packages/roslaunch/launch.py
/usr/lib/python2.7/dist-packages/roslaunch/loader.py
/usr/lib/python2.7/dist-packages/roslaunch/netapi.py
/usr/lib/python2.7/dist-packages/roslaunch/node_args.py
/usr/lib/python2.7/dist-packages/roslaunch/nodeprocess.py
/usr/lib/python2.7/dist-packages/roslaunch/param_dump.py
/usr/lib/python2.7/dist-packages/roslaunch/parent.py
/usr/lib/python2.7/dist-packages/roslaunch/pmon.py
/usr/lib/python2.7/dist-packages/roslaunch/remote.py
/usr/lib/python2.7/dist-packages/roslaunch/remoteprocess.py
/usr/lib/python2.7/dist-packages/roslaunch/rlutil.py
/usr/lib/python2.7/dist-packages/roslaunch/roslaunch_logs.py
/usr/lib/python2.7/dist-packages/roslaunch/scriptapi.py
/usr/lib/python2.7/dist-packages/roslaunch/server.py
/usr/lib/python2.7/dist-packages/roslaunch/substitution_args.py
/usr/lib/python2.7/dist-packages/roslaunch/xmlloader.py