For those using python3 you can use the following python code:

To switch on/off (tplink-smartplug.py)

#!/usr/bin/env python3
#
# TP-Link Wi-Fi Smart Plug Protocol Client
# For use with TP-Link HS-100 or HS-110
#
# by Lubomir Stroetmann
# Copyright 2016 softScheck GmbH
#
# modified by Kawa ...