/usr/share/debhelper/autoscripts/preinst-pycentral-clean is in python 2.7.3-0ubuntu2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 | # make sure python-central files are removed before new package is installed
if [ "$1" = upgrade ] && [ -f /var/lib/pycentral/#PACKAGE#.pkgremove ]
then
pycentral pkgremove #PACKAGE#
rm -f /var/lib/pycentral/#PACKAGE#.pkgremove
fi
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