I think that whole paragraph he mixed up python 2 and 3. >However, Python installs in separate installations. My code for Python 3.5 won't work with the Python

I think that whole paragraph he mixed up python 2 and 3. >However, Python installs in separate installations. My code for Python 3.5 won't work with the Python 3.7 installation unless I intentionally port it to 3.7. Enough Linux developers have decided that porting isn't worth the effort, so Ubuntu installs with both Python2 and Python3 -- because they are needed by different core functions. The way he just segways from talking about 3.5 to 3.7 seems really unnatural, I think he's talking more about from python 2 to 3, since that's what the second sentence is about. All code from 3.5 should work 3.7, unless they were using some undefined behavior of some sorts. A quick google reveals python 3.6 is fully backwards compatible with 3.5, and 3.7 has only 2 exceptions. The words async and await are now reserved. So even if he did have a problem with this, any ide, or even just a find replace in a text editor, would be able to refactor the 3.5 code to work. >https://docs.python.org/3/whatsnew/3.7.html https://docs.python.org/3/whatsnew/3.7.html