launch_instance.py

def launch_instance(image_id, instance_id, client_src, client_des, ec2_resource_des):
    # create waiter for destination instance to check if instance status is `ok`
    waiter = client_des.get_waiter('instance_status_ok')
    # get the source instance details needed for launching the instance
    instance_detail = get_instance_details(instance_id, client_src)
    # launch instance using create_instances() method of ec2 resource
    try:
        response = ec2_resource_des.create_instances(
            ImageId=image_id,
            InstanceType=instance_detail['instance_type'],
            MaxCount=1,
            MinCount=1,
            DryRun=False,
            Monitoring={'Enabled': False},
        )
        instance_id = str(response[0]).split("'")[1]
        print('Creating instance, this may take few minutes...')
        waiter.wait(InstanceIds=[instance_id], DryRun=False)
        return dict(success=True)
    except Exception as e:
        print('Error in launching intance with error: ' + str(e))
        return dict(success=False, error_msg=str(e))