This challenge is extremely easy. You use wget to download the file and then run the script using Python.

If you want to learn more about wget, then in the terminal type the following.

man wget
wget https://artifacts.picoctf.net/c/34/runme.py
πŸ’‘
A short description from Wikipedia: GNU Wget (or just Wget, formerly Geturl, also written as its package name, wget) is a computer program that retrieves content from web servers. It is part of the GNU Project. Its name derives from β€œWorld Wide Web” and β€œget”. It supports downloading via HTTP, HTTPS, and FTP.
python3 runme.py

That’s all.