Simple script to control ec2 instances

ec2.py

import boto3
import sys
import pprint

# Let's use Amazon S3
ec2 = boto3.client('ec2')
ec2Res = boto3.resource('ec2')

if len(sys.argv) < 2:
    print("No argument provided ... just listing")
    action = "LIST"
else:
    action = sys.argv[1].upper()

print("{} action requested \n".format(action))

instances = ec2Res.instances.filter()
instancesIds = []

for i in instances:
    instancesIds.append(i.id)

if action == "ON":
    print("Starting instances ...")
    response = ec2.start_instances(InstanceIds=instancesIds)
    pprint.pprint(response)


elif action == "OFF":
    print("Stopping instances ...")
    response = ec2.stop_instances(InstanceIds=instancesIds)
    pprint.pprint(response)


elif action == "LIST":
    print("Status of instances: \n")
    for i in instances:
        print("{} is {}".format(i.id, i.state["Name"]))
    print("\n")

elif action == "REBOOT":
    print("Rebooting instances: \n")
    response = ec2.reboot_instances(InstanceIds=instancesIds)
    pprint.pprint(response)

elif action == "GIT":
    print("Running git ... \n")
    ssm = boto3.client("ssm")


else:
    print("Action {} not available".format(action))