/usr/lib/x86_64-linux-gnu/libpython2.7.so is in libpython2.7-dev 2.7.15~rc1-1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libpython2.7.so.1
/usr/lib/x86_64-linux-gnu/libpython2.7.so.1