Well, I took another stab at it…
Found the file BlynkLib.py in /home/pi/.local/lib/python2.7/site-packages/ (on my system )
EDIT - And on my RPi3 it appears it is in /usr/local/lib/python2.7/dist-packages
And I found that if you open a Terminal CLI, go to that folder and type python, you get the Python prompt >>>
And finally, after copy/pasting the entire example sketch at that prompt, it tries to connect… now I don’t have my App set for Cloud, so I edited the BlynkLib.py file for what I think wat the proper method, but now it is getting all sorts of errors…
So until I do, I recommend you try the similar method as listed above, but using the default Cloud Server.