delete_instances.py

def delete_instances(instance_tag="your_tag" , instance_state="stopped"):
	"""
		The function
		1. filters all the instances by tag and instance-state
		2. terminates/deletes the filtered instances (irreversible action!!!)
	"""
	reserves = conn.get_all_instances( filters={"tag-value":instance_tag , "instance-state-name":instance_state} )
	for r in reserves:
		for instance in r.instances:
			instance.terminate()
			print "OK! instance -"+str(instance.id)+"- was deleted. \n"