/usr/share/python3/runtime.d/libsigrokdecode2.rtupdate is in libsigrokdecode2 0.3.0-1+b3.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
| 1 2 3 4 5 6 7 | #! /bin/sh
set -e
if [ "$1" = rtupdate ]; then
	py3clean -p libsigrokdecode2 /usr/share/libsigrokdecode2
	py3compile -p libsigrokdecode2 -V 3.2- /usr/share/libsigrokdecode2
fi
 |