The Python 3.8 beta cycle is already underway, with Python 3.8.0b1
released on June 4, followed by the second beta
on July 4. That means that Python 3.8 is feature complete at
this point, which makes it a good time to see what will be part of it when
the final release is made. That is currently scheduled
for October, so users don’t have that long to wait to start using those new
features.

Source: LWN.net – [$] What’s coming in Python 3.8