deploy a wordpress into a subfolder where the domain context is a django project. use /blog/ context path.

nginx.conf

# wordpress files must live here:
# /home/ubuntu/www/blog.xxx.com/wordpress/blog/

server {

.....

    root /home/ubuntu/www/blog.xxx.com/wordpress;
    location /blog/ {
        index index.php;

        if (-e $request_filename) {
           break;
        }
        rewrite ^/(.+)$ /index.php?q=$1 last;
    }
    location ~ .php {

            include /usr/local/nginx/conf/fastcgi_params;
            fastcgi_pass   127.0.0.1:9000;
            fastcgi_index  index.php;
            fastcgi_param SCRIPT_FILENAME /home/ubuntu/www/blog.xxx.com/wordpress$fastcgi_script_name;
            #fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
            include        fastcgi.conf;
    }

 ......

    location / {
     ......
    }
} # closes server