title: Download File from website without filename? Python 3.4
body: <p>I dont know where to exactly start here, and I have to admit my knowledge of python and websites are limited.  However In the past ive done some requests from an api and accessed a file or two from a website but I had some examples to build off of.  In this case I have no written example to help me through the process so I dont really know where to start or if "requests" is even the way to go.</p>
  
  <p>What I have is a distributor's website that has a file with product information.
  If I were to download this file manually I would have to login, navigate to the download section of the website.  At this point a popup appears where I select the brand I want to download, I have options to select from as far as data I would like to gather, a text box to name the file and a download button that has no url.</p>
  
  <p>Im sure all this seems pretty vague since I dont know what info would be helpful at this point.  </p>
  
  <p>A nudge in the right direct would be great!!
  Thanks
  <a href="http://i.stack.imgur.com/hz9CE.jpg" rel="nofollow">Screen shot of popup</a></p>