What is the difference between mod_wsgi and uwsgi?

python apache nginx wsgi uwsgi

They are just 2 different ways of running WSGI applications.
Have you tried googling for mod_wsgi nginx?
Any wsgi compliant server has that entry point, that's what the wsgi specification requires.
Yes, but that's only how uwsgi communicates with Nginx. With mod_wsgi the Python part is run from within Nginx, with uwsgi you run a separate app.

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