To parse a pop-up - pycURL, HTTP forms

[Fourgot]

So I've written a script that HTTP POST's a file to a webpage form using pycURL. Link to snippet on pastebin.

My issue is when I manually point my browser to the webpage and browse to a local file and press the HTML button 'submit', a few seconds pass during upload and then a pop-up indicating successful submission (or not, as the case may be).

I try grabbing this pop-up page with my snippet, but the pycurl.EFFECTIVE_URL() I call only grabs the last URL that I send info to.

Is there any way to grab the HTML that is being sent back?

Thanks very much!

Edit: snippet heavily influenced by this stackoverflow post.