Data Scraping / Extraction

I require a program that will automatically extract data from a website. - The website requires a postal code (I have a list of postal codes) and will return address fields, but only 5 at a time. One is required to click "more" in oder to see further address fields. The program needs to support this. - The website exits in different in different language flavours, that seem to work all the same except for the domain name. The program should support this. - Proxyserver support is wanted. - Sorting and eliminating duplicates is nice to have, but otherwise its a oneliner in bash. I require the source code for this project. I work with a mac and I would prefer a python solution. Although if you find it easier in Java or C++ you can propose that, too.