Maybe this is a silly question, I just set up free Amazon Linux instance according to the tutorial, what I want to do is simply running python scripts.
Then I googled AWS and Python, Amazon mentioned Boto.
I don't know why using Boto. Because if I type python, it already installed.
What I want to do is run a script on day time. 
Is there a need for me to reading about Boto or just run xx.py on AWS ?
Any help is appreciated.
Boto is a python interface to Amazon Services (like copying to S3, etc).
You don't need it to just run regular python as you would on any linux instance with python installed, except to access AWS services from your EC2 instance.
Running Python scripts on Amazon Web Services? Do I need to use Boto?