Some days are passed, but I'm still pleased to announce that
It was a really nice experience, it offered me the possibility to work on Matplotlib, do some really interesting stuff, and I'm quite proud of it :)
On the other hand, it was not a "straight" way: the effort I put in this was huge, practically I had to stop all other stuffs and projects I was working on (Debian included) and I was getting more and more tired as time passed. Also, sometimes Packt employees and actions were somehow problematic. but anyhow, the important thing is that THE BOOK IS OUT!!
Now I got also a nice box about the book on the sidebar of this blog!