How do you install mod_wsgi?
Using sudo a2enmod wsgi
should enable the module for you once you reload apache, as most modules don't need the mod_ prefix when enabling them.
sudo nano /etc/apache2/mods-available/wsgi.load
add the next string to the file
LoadModule wsgi_module /usr/lib/apache2/modules/mod_wsgi.so
save, then
sudo a2enmod wsgi
sudo service apache2 restart
Step 1: The following command will install wgsi module
sudo apt-get install libapache2-mod-wsgi
Step 2: To enable the wsgi module run the following command
sudo a2enmod wsgi
Step 3: Restart your apache server by running
sudo systemctl restart apache2
Step 4: Check whether the module is loaded
apache2ctl -t -D DUMP_MODULES
P.S: I am using Ubuntu 18.04 LTS