Which version of python3 is sololearn teaching python 3.7 or what?

Answer 1

Try in the code playground coding in python
import sys
print(sys.version)

I get 3.8 in mine.

Answer 2

import sys
print(sys.version)

I get 3.8.4
https://code.sololearn.com/cfZGN6hqYN89/?ref=app