There is no tutorial at the moment. If you want to get started with pyvhist, have a look at the vhistblock module, the vhistsection module, the vhistfile module and the userattrs module. The classes described on these pages present 95% of what you need when using pyvhist.
Also have a look at the collection of examples in the pyvhist/examples/ directory. You can start each example just by typing:
python examplename.py
(Linux, Mac OS X) or:
examplename.py
(Windows) on the commandline prompt.