postinst is in python-twisted-core 17.9.0-2.
This file is a maintainer script. It is executed when installing (*inst) or removing (*rm) the package.
The actual contents of the file can be viewed below.
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 | #! /bin/sh
set -e
# Automatically added by dh_python2:
if which pycompile >/dev/null 2>&1; then
	pycompile -p python-twisted-core 
fi
# End automatically added section
rebuild_cache()
{
    # remove all cache files, then rebuild for the installed python versions
    rm -f /usr/lib/python2.?/*-packages/twisted/plugins/dropin.cache
    for p in $(pyversions -i); do
	$p -c 'from twisted.plugin import IPlugin, getPlugins; list(getPlugins(IPlugin))' \
	  >/dev/null 2>&1 || true
    done
}
case "$1" in
    triggered)
	if [ "$2" = twisted-plugins-cache ]; then
	    rebuild_cache
	fi
	;;
    configure)
	rebuild_cache
	;;
esac
exit 0
 |