I am trying to fill the form of this website http://www.marutisuzuki.com/Maruti-Price.aspx.
It consists of three drop down lists. One is Model of the car, Second is
I had the same issue with the tutorial, and this worked for me:
item = mechanize.Item(br.form.find_control(name='searchAuxCountryID'),{'contents': '3', 'value': '3', 'label': 3})