/usr/lib/python2.7/dist-packages/sage/coding/ is in sagemath-common 7.4-9.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/python2.7/dist-packages/sage/coding/__init__.py
/usr/lib/python2.7/dist-packages/sage/coding/all.py
/usr/lib/python2.7/dist-packages/sage/coding/binary_code.pxd
/usr/lib/python2.7/dist-packages/sage/coding/bounds_catalog.py
/usr/lib/python2.7/dist-packages/sage/coding/channel_constructions.py
/usr/lib/python2.7/dist-packages/sage/coding/channels_catalog.py
/usr/lib/python2.7/dist-packages/sage/coding/code_bounds.py
/usr/lib/python2.7/dist-packages/sage/coding/code_constructions.py
/usr/lib/python2.7/dist-packages/sage/coding/codecan/
/usr/lib/python2.7/dist-packages/sage/coding/codecan/__init__.py
/usr/lib/python2.7/dist-packages/sage/coding/codecan/codecan.pxd
/usr/lib/python2.7/dist-packages/sage/coding/codes_catalog.py
/usr/lib/python2.7/dist-packages/sage/coding/databases.py
/usr/lib/python2.7/dist-packages/sage/coding/decoder.py
/usr/lib/python2.7/dist-packages/sage/coding/decoders_catalog.py
/usr/lib/python2.7/dist-packages/sage/coding/delsarte_bounds.py
/usr/lib/python2.7/dist-packages/sage/coding/encoder.py
/usr/lib/python2.7/dist-packages/sage/coding/encoders_catalog.py
/usr/lib/python2.7/dist-packages/sage/coding/extended_code.py
/usr/lib/python2.7/dist-packages/sage/coding/grs.py
/usr/lib/python2.7/dist-packages/sage/coding/guava.py
/usr/lib/python2.7/dist-packages/sage/coding/guruswami_sudan/
/usr/lib/python2.7/dist-packages/sage/coding/guruswami_sudan/__init__.py
/usr/lib/python2.7/dist-packages/sage/coding/guruswami_sudan/gs_decoder.py
/usr/lib/python2.7/dist-packages/sage/coding/guruswami_sudan/interpolation.py
/usr/lib/python2.7/dist-packages/sage/coding/guruswami_sudan/utils.py
/usr/lib/python2.7/dist-packages/sage/coding/hamming_code.py
/usr/lib/python2.7/dist-packages/sage/coding/linear_code.py
/usr/lib/python2.7/dist-packages/sage/coding/punctured_code.py
/usr/lib/python2.7/dist-packages/sage/coding/reed_muller_code.py
/usr/lib/python2.7/dist-packages/sage/coding/relative_finite_field_extension.py
/usr/lib/python2.7/dist-packages/sage/coding/sd_codes.py
/usr/lib/python2.7/dist-packages/sage/coding/self_dual_codes.py
/usr/lib/python2.7/dist-packages/sage/coding/source_coding/
/usr/lib/python2.7/dist-packages/sage/coding/source_coding/__init__.py
/usr/lib/python2.7/dist-packages/sage/coding/source_coding/all.py
/usr/lib/python2.7/dist-packages/sage/coding/source_coding/huffman.py
/usr/lib/python2.7/dist-packages/sage/coding/subfield_subcode.py
/usr/lib/python2.7/dist-packages/sage/coding/two_weight_db.py