How to create a SSH tunnel using Python and Paramiko?

I need to create tunneling to read information from a database. I use Paramiko, but I have not worked with tunneling yet. Please provide an example of a simple code that creates and closes a tunnel.

Answer

At work we usually create ssh tunnels forwarding ports. The way we do that is, by using the standard command ssh -L port:addr:port addr with subprocess running in a separate thread. I found this useful link: https://github.com/paramiko/paramiko/blob/master/demos/forward.py with an example of doing port forwarding with paramiko.