/usr/lib/python2.7/dist-packages/gnuradio/grc/core/ is in gnuradio 3.7.11-10.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/python2.7/dist-packages/gnuradio/grc/core/Block.py
/usr/lib/python2.7/dist-packages/gnuradio/grc/core/Config.py
/usr/lib/python2.7/dist-packages/gnuradio/grc/core/Connection.py
/usr/lib/python2.7/dist-packages/gnuradio/grc/core/Constants.py
/usr/lib/python2.7/dist-packages/gnuradio/grc/core/Element.py
/usr/lib/python2.7/dist-packages/gnuradio/grc/core/FlowGraph.py
/usr/lib/python2.7/dist-packages/gnuradio/grc/core/Messages.py
/usr/lib/python2.7/dist-packages/gnuradio/grc/core/Param.py
/usr/lib/python2.7/dist-packages/gnuradio/grc/core/ParseXML.py
/usr/lib/python2.7/dist-packages/gnuradio/grc/core/Platform.py
/usr/lib/python2.7/dist-packages/gnuradio/grc/core/Port.py
/usr/lib/python2.7/dist-packages/gnuradio/grc/core/__init__.py
/usr/lib/python2.7/dist-packages/gnuradio/grc/core/block.dtd
/usr/lib/python2.7/dist-packages/gnuradio/grc/core/block_tree.dtd
/usr/lib/python2.7/dist-packages/gnuradio/grc/core/default_flow_graph.grc
/usr/lib/python2.7/dist-packages/gnuradio/grc/core/domain.dtd
/usr/lib/python2.7/dist-packages/gnuradio/grc/core/flow_graph.dtd
/usr/lib/python2.7/dist-packages/gnuradio/grc/core/generator/
/usr/lib/python2.7/dist-packages/gnuradio/grc/core/generator/FlowGraphProxy.py
/usr/lib/python2.7/dist-packages/gnuradio/grc/core/generator/Generator.py
/usr/lib/python2.7/dist-packages/gnuradio/grc/core/generator/__init__.py
/usr/lib/python2.7/dist-packages/gnuradio/grc/core/generator/flow_graph.tmpl
/usr/lib/python2.7/dist-packages/gnuradio/grc/core/utils/
/usr/lib/python2.7/dist-packages/gnuradio/grc/core/utils/__init__.py
/usr/lib/python2.7/dist-packages/gnuradio/grc/core/utils/complexity.py
/usr/lib/python2.7/dist-packages/gnuradio/grc/core/utils/epy_block_io.py
/usr/lib/python2.7/dist-packages/gnuradio/grc/core/utils/expr_utils.py
/usr/lib/python2.7/dist-packages/gnuradio/grc/core/utils/extract_docs.py
/usr/lib/python2.7/dist-packages/gnuradio/grc/core/utils/odict.py