list ec2 instances for an access key

ec2_instances.py

import boto
import boto.ec2


accounts = [
    ('<AWS_access_key_id>', '<AWS_secret_access_key>'),
]
REGIONS = ['us-east-1', 'us-west-2', 'us-west-1']

for key, secret in accounts:
    for region in REGIONS:
        print region
        cec2 = boto.ec2.connect_to_region(region, aws_access_key_id=key, aws_secret_access_key=secret)
        statuses = cec2.get_all_instance_status()
        for status in statuses:
            print status.id