python argparse reference

The cleanest example to parse options for a python program:

https://pymotw.com/2/argparse/

Getting AWS instances using certain image-id with CLI

1. Create a file filters.json
2. $ aws ec2 describe-instances --filters file://filters.json

The filters.json file looks like this:

[

  {

    "Name": "image-id",

    "Values": ["ami-dc6aa9b1"]

  }

]