This python script can be used to automate "signal newnym" process of TOR to request new IP address eq. change it's exit node.
Things you should take care of:

• Script needs python-socksipy package to be installed
• Be sure to edit the password in the script
• Remember also set the controlport and password in torrc config file, in Debian this can be found from /etc/tor/torrc
• You can generate the hash needed for HashedControlPassword directive in torrc with tor --hash-password placeyourpwdhere