/usr/share/doc/python3-flask-login/html is in python3-flask-login-doc 0.4.0-1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/python3-flask-login/../python3-flask-login-doc/html
/usr/share/doc/python3-flask-login/../python3-flask-login-doc/html