Django developer Rob Hudson has built an extensible Django Debug Toolbar for viewing common information, such as HTTP headers and SQL queries. When installed and enabled, the toolbar takes up less than thirty pixels at the top of the screen. You can click one of the panels (there are currently seven available) and an overlay opens for that panel.
The inspiration came from the Symfony Project, a PHP framework. Hudson announced his project after Cal Henderson showed something similar for Pownce at DjangoCon during Henderson’s Why I Hate Django talk. Later, Hudson collaborated with fellow developer David Cramer, so the toolbar grew out of the Django community.
One of the coolest things about the project is that each panel is separate. So, if you don’t want the one that shows the current version, you don’t have to include it. Even better, if it’s missing functionality you want, or there’s something specific to your project you want to show in the debug toolbar, you can write your own panel.
Unlike many of the toolbars we see, this one is not installed in the browser. It resides on the same server as your Django installation. It’s meant for developers, not end-users, so it only shows when it matches the IP addresses added to the INTERNAL_IPS Django setting.
[Screenshot by David Cramer]