Apache2 configuration to run both django and flask in one server.

# Under /etc/apache2/sites-available/ add a file say multi_sites.conf with the following contents 
project name of django is DP and project name of flask is FP:

<VirtualHost *>
   Alias /static /../DP/static
   <Directory /.../DP/static>
        Require all granted
   </Directory>
   <Directory  /../DP/DP>
        <Files wsgi.py>
            Require all granted
        </Files>
    </Directory>
   WSGIDaemonProcess  python-path=/../DP/
   WSGIProcessGroup DP
   WSGIScriptAlias / /../DP/DP/wsgi.py
</VirtualHost>

<VirtualHost *>
    Alias /static /../FP/static
   <Directory /../FP/static>
        Require all granted
   </Directory>
   <Directory /../FP/>
       <Files wsgi.py>
           Require all granted
       </Files>
   </Directory>
   WSGIDaemonProcess ocean python-path=/../FP/
   WSGIScriptAlias / /../FP/wsgi.py
</VirtualHost>

3. Enable sites: 
sudo a2ensite multi_sites.conf
sudo a2dissite 000-default.conf
sudo apache2ctl restart