I try to be constantly aware of what things in my digital life need to be backedup. One of the things that I have NOT been backing up on a regular basis is my pinboard bookmarks.
When I finally got around to implementing the python script that was included in the post however, I found that I did not have a module installed and it was not show up in a quick 'apt-cache search pyzt', so I looked a little closer at it, and at the pinboard api and discovered that all I really needed was a single commandline:
/usr/bin/wget -O ~/Dropbox/pinboard/pinboard_backup.xml "https://api.pinboard.in/v1/posts/all?auth_token=$(cat ~/.pinboard-credentials)"
My ~/.pinboard-credentials file contains my pinboard API token from pinboard.in/setttings/password exactly as it is presented on the webpage.
So I dropped that into my crontab as a daily item, and now I will have a daily backup of my pinboard bookmarks.