Python module to inspect an online btrfs filesystem

 The primary goal of this module is to be able to inspect the internals of a
 mounted, online, filesystem for educational purposes.
 .
 A second goal is to provide a nicer way for automating administration tasks
 and writing monitoring scripts by being able to just programmatically access
 the needed information, instead of having to spend most of the time on parsing
 human readable output from other btrfs tools.