Use a Grove button with GoPiGo

I had purchased a Grove Button
I want to connect it to my GoPiGo and read it’s value wih python scripts.
First, in which port can I connect it ?
Secondly, how can I read it’s value in python ? I didn’t find the doc for doing that.
Thanks in advance, if someone can help me…

You should be able to use the button on the analog or digital port and there is an example here: