postinst is in python-stestr 1.1.0-0ubuntu2.
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 | #!/bin/sh
set -e
if [ "$1" = "configure" ] ; then
	update-alternatives --install /usr/bin/stestr stestr /usr/bin/python2-stestr 300
fi
# Automatically added by dh_python2:
if which pycompile >/dev/null 2>&1; then
	pycompile -p python-stestr 
fi
# End automatically added section
exit 0
 |