Pass URL query to application through stdin like so: python3 SmartClient http://www.hostname.com OR ./SmartClient.py www.hostname.com - while in this dir You may need to update perm on file with: sudo u+x SmartClient.py in order the run the file with this method. Accepted URL formats are: PROTOCOL://www.HOSTNAME.com:PORT or www.HOSTNAME.com:PORT or PROTOCOL://www.HOSTNAME.com or PROTOCOL://www.HOSTNAME.com If PROTOCOL not provided defaults to HTTP and if PORT not provided defaults to 80. Additional arguments will be ignored and at least one argument is required.