Get running instance names on EC2

gistfile1.py

import boto.ec2
c = boto.ec2.connect_to_region('ap-northeast-1', 
                               aws_access_key_id=aws_access_key_id, 
                               aws_secret_access_key=aws_secret_access_key)

reservations = c.get_all_instances()
instances = [item for sublist in reservations for item in sublist.instances]
for instance in instances:
    if instance.state != 'running':
        continue
    print instance.tags.get('Name')