I'm writing some code to interact with an HP Helion Eucalyptus 4.2 cloud server. 
At the moment I'm using boto 2.38.0, but I discovered that also exists 
the boto3 version.
Which version should I use in order to keep the code up with the times?
I mean, It seems that boto3's proposal is a ground-up rewrite more focused
on the "official" Amazon Web Services (AWS).
2.38 is the right version. boto3 is something totally different and I don't have experience with it.
Proper version of boto for Eucalyptus cloud