Python 3.6.4 due for release December 18, 2017 (maybe) see
PEP 494
Just downloaded Python 3.6.4 this morning, so it is now official.
i think i am still using like 3.4
Running 3.4 on the Linux machine(s), the default version. I try and use the latest on the Windows machine, only because it's easy to upgrade. When they release 3.7, I'll probably uninstall and install as new.
does python ever go past X.8? Or after 3.8 they are just going to come out with 4.0?
AFAIK, the BDFL's plan is that 4.0 is just going to be the next version after 3.9, since no breaking changes are planned for.
There are some people who think 3.10 would be more reasonable, but they're not the ones deciding...
yeah i think 3.10 would be better, as 4.0 would be deceiving, like there is going to be another massive change or something based on the 2->3. Or maybe its my brain saying it just should be because its more significant
On my Ubuntu box if I type python into the terminal it runs Python 3.6.0 because of miniconda. But ipython runs on 3.5.2 which is the default version for python3 command. It's kinda messy.

On my Arch it's more simple. I just have to wait for a couple of weeks until they decide that 3.6.4 is stable.