如何从Linux终端使用./运行python？

Question

I have a .py python script and when I run it typing ./filename.py I obtain a syntax error. However, when I run it typing python filename.py my program executes correctly.

How to make it run correctly typing ./filename.py ? I think it is related to the $PATH variable but I don't have any further idea.

Answer 1

put either a shebang at the start of the file, or run with python for example:

#!/usr/bin/env python3

or run:

python3 filename.py