Select line in current python script and run them in python interpreter?

Question

I am new to SpaceVim and would like to use it to develop in python. I am actually new to non GUI IDE, which is why I am starting with SpaceVim instead of vanilla NeoVim.

This said, I would like to run part of a script (only part of it) into a terminal to check if the code is working as intended. Should I open an external terminal, start python, and copy/past my code to it?

SpaceVim states how to run the full python script, SPC l r but not how to select lines to only run those.

Please, how could I do that?

Thanks a lot for your help!