/usr/lib/python3/dist-packages/Flask-0.10.1.egg-info/requires.txt is in python3-flask 0.10.1-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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Werkzeug>=0.7 Jinja2>=2.4 itsdangerous>=0.21