Alter installation command for python 3.8 or when will it be new default?

Hi community,

is it possible to alter the installation command below to install a different than the default python verison e.g. version 3.8?
#!/bin/bash
curl -L https://tljh.jupyter.org/bootstrap.py
| sudo python3 -
–admin

If not is there a timeline when 3.8 will be the new default version?

Many thanks

Tom