Get all ec2 instance

getAllInstance.py

from pprint import pprint
from boto import ec2
#You need to give access keys and key secret too..
ec2conn=ec2.connect_to_region('us-west-1')

#A reservation corresponds to a command to start instances. You can see what instances are associated with a reservation:
#Here reservation is like group of instance which can be started and stopped instantly as group
reservations=ec2conn.get_all_instances()
for reservation in reservations:
    instance=reservation.instances
    print instance


#Referenc: https://cloudpages.wordpress.com/2013/12/18/listing-all-of-your-ec2-instances-using-boto/