Downloading a file at a specified location through python and selenium using Chrome driver

Question

I am trying to automatically download some links through selenium's click functionality and I am using a chrome webdriver and python as the programming language. How can I select the download directory through the python program so that it does not get downloaded in the default Downloads directory. I found a solution for firefox but there the download dialog keeps popping up every time it clicks on the link which does not happen in Chrome.

Answer 1

Update 2018:

Its not valid Chrome command line switch, see the source code use hoju answer below to set the Preferences.

Original:

You can create a profile for chrome and define the download location for the tests. Here is an example:

from selenium import webdriver

options = webdriver.ChromeOptions() 
options.add_argument("download.default_directory=C:/Downloads")

driver = webdriver.Chrome(chrome_options=options)