instances = myec2.create_instances(MinCount=1,
                                   MaxCount=1,
                                   ImageId='ami-01e444924a2233b07',
                                   InstanceType='t2.nano',
                                   KeyName="myawskey",
                                   Placement={'AvailabilityZone': vol_az})
 
instance_id = instances[0].id
