Flask hello world using apache and mod_wsgi shows files in webroot only
in /var/www/flask_dev/hello.wsgi you should be importing app not ass.Second you should not be using DocumentRoot to store your scripts. DocumentRoot is for storing static files and so it will certainly list them as files and never run them as script.
Try using
WSGIScriptAlias / /var/www/flask_dev/hello.wsgi <Directory "/var/www/flask_dev"> WSGIProcessGroup hello WSGIApplicationGroup %{GLOBAL} Order deny,allow Allow from all </Directory>Check this page.