apt install mercurial uwsgi-core uwsgi-plugins-all

foobar.py

def application(env, start_response):
    start_response('200 OK', [('Content-Type','text/html')])
    return [b"Hello World"]

uwsgi --plugins http,python3 --http :9090 --wsgi-file foobar.py

$ telnet 127.0.0.1 9090
Trying 127.0.0.1...
Connected to 127.0.0.1.
Escape character is '^]'.
HEAD / HTTP/1.0

HTTP/1.0 200 OK
Content-Type: text/html

Hello World

NGINX setup

UWSGI