Python scripts can be executed by passing the script name to the python command or created as executable commands that can run stand-alone. You’ll learn how to create both in this lesson.
script.py:
print("Hello World")
When we want to run the script, we can do:
python3 script.py
We can also make the script a stand-alone executable:
#! /usr/bin/env python print("Hello World")
chmod +x script.py
./script.py
[Python] Execute a Python Script
原文：http://www.cnblogs.com/Answer1215/p/8012206.html