/usr/share/binfmts/python2.7 is in python2.7-minimal 2.7.3-0ubuntu3.9.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 | package python2.7
interpreter /usr/bin/python2.7
magic \x03\xf3\x0d\x0a
|