How do I automatically download files from a pop up dialog using selenium-python

Question

I am trying to automatically download files from a pop up dialog using selenium-python.

The firefox popups look like this

Answer 1

In python, but this will work in Java as well because the firefox preferences are a javascript:

profile.set_preference("browser.download.panel.shown", False)
profile.set_preference("browser.helperApps.neverAsk.openFile","text/csv,application/vnd.ms-excel")
profile.set_preference("browser.helperApps.neverAsk.saveToDisk", "text/csv,application/vnd.ms-excel")
profile.set_preference("browser.download.folderList", 2);
profile.set_preference("browser.download.dir", "c:\\firefox_downloads\\")
browser = webdriver.WebDriver(firefox_profile=profile)

this works for CSV files, modify it for whatever filetype you are downloading.