darktable

You need to add the DarkTable ppa (assuming you are running Ubuntu) this is accomplished like this

sudo add-apt-repository ppa:pmjdebruijn/darktable-release

Once you have got that setup

sudo apt-get update sudo apt-get install darktable

Purge

Sometime it is necessary to purge

QUit

Just press the quit button
for a in range(1,20):
    print a