/usr/share/pyshared/provisioningserver/pxe/ is in python-maas-provisioningserver 1.2+bzr1373+dfsg-0ubuntu1~12.04.6.
This file is owned by root:root, with mode 0o755.
..
/usr/share/pyshared/provisioningserver/pxe/__init__.py
/usr/share/pyshared/provisioningserver/pxe/config.commissioning.armhf.template
/usr/share/pyshared/provisioningserver/pxe/config.commissioning.template
/usr/share/pyshared/provisioningserver/pxe/config.install.armhf.template
/usr/share/pyshared/provisioningserver/pxe/config.install.template
/usr/share/pyshared/provisioningserver/pxe/config.local.amd64.template
/usr/share/pyshared/provisioningserver/pxe/config.local.i386.template
/usr/share/pyshared/provisioningserver/pxe/config.local.template
/usr/share/pyshared/provisioningserver/pxe/config.local.x86.template
/usr/share/pyshared/provisioningserver/pxe/config.py
/usr/share/pyshared/provisioningserver/pxe/install_bootloader.py
/usr/share/pyshared/provisioningserver/pxe/install_image.py
/usr/share/pyshared/provisioningserver/pxe/tftppath.py