cython_bbox is widely used in object detection tasks. To my best knowledge, it was first implemented in Faster-RCNN. Since then, almost all object detection projects use the source code directly.
usage: cpp2py [-h] [--sources [SOURCES [SOURCES ...]]] [--modname [MODNAME]] [--outdir [OUTDIR]] [--incdirs [INCDIRS [INCDIRS ...]]] [--globals GLOBALS] [--nobuild ...