/usr/lib/python3/dist-packages/blockdiag/imagedraw/ is in python3-blockdiag 1.4.7-1.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/python3/dist-packages/blockdiag/imagedraw/__init__.py
/usr/lib/python3/dist-packages/blockdiag/imagedraw/base.py
/usr/lib/python3/dist-packages/blockdiag/imagedraw/filters/
/usr/lib/python3/dist-packages/blockdiag/imagedraw/filters/__init__.py
/usr/lib/python3/dist-packages/blockdiag/imagedraw/filters/linejump.py
/usr/lib/python3/dist-packages/blockdiag/imagedraw/pdf.py
/usr/lib/python3/dist-packages/blockdiag/imagedraw/png.py
/usr/lib/python3/dist-packages/blockdiag/imagedraw/simplesvg.py
/usr/lib/python3/dist-packages/blockdiag/imagedraw/svg.py
/usr/lib/python3/dist-packages/blockdiag/imagedraw/textfolder.py
/usr/lib/python3/dist-packages/blockdiag/imagedraw/utils/
/usr/lib/python3/dist-packages/blockdiag/imagedraw/utils/__init__.py
/usr/lib/python3/dist-packages/blockdiag/imagedraw/utils/ellipse.py
/usr/lib/python3/dist-packages/blockdiag/imagedraw/utils/pillow.py