image_grab
There are plenty of images that I like to save from r/pics so I decided to put a bit of time aside to write a script to do it. You can grab it from the image_grab bitbucket repo.
I have opted to download the page and then parse it using beautifulsoup. I could have used reddit's json api but I believe there were some restrictions at least at the time that made the more old fashioned approach better. You should still not use it more often than every 30 minutes.
It uses a config file so you can set some options easily without sifting through the code. You can get started by just creating an images and logs folder in the same directory as the script. You can read more about tweaking it within the script.