Running python script with python3 using ./

Question

How do I run a python script with python 3.7 by using this syntax: ./main.py?

By default, it runs with python 2.7 and thus I'm forced to run the script with python3 ./main.py

I am on MacOS.

Answer 1

You could place a shebang on the first line of the file to make it executable (by python3):

#!/usr/bin/env python3