python search with image google images

i'm having a very tough time searching google image search with python. I need to do it using only standard python libraries (so urllib, urllib2, json, ..) Can somebody please help? Assume the image is jpeg.jpg and is in same folder I'm running python from. I've tried a hundred different code versions, using headers, user-agent, base64 encoding, different urls (images.google.com, http://images.google.com/searchbyimage?hl=en&biw=1060&bih=766&gbv=2&site=search&image_url={{URL To your image}}&sa=X&ei=H6RaTtb5JcTeiALlmPi2CQ&ved=0CDsQ9Q8, etc....) Nothing works, it's always an error, 404, 401 or broken pipe :( Please show me some python script that will actually seach google images with my own image as the search data ('jpeg.jpg' stored on my computer/device) Thank you for whomever can solve this, Dave:)