shit

#!/usr/bin/env python3

import boto3
import sys

def print_ec2(region = None):
    ec2 = boto3.resource('ec2')

    instances = ec2.instances.filter(Filters=[{'Name': 'availability-zone', 'Values': [region]}])

    for instance in instances:
        print("Instance name:", instance.name, ", Instance primary address", instance.network_interface.adress.primary)


if __name__ == '__main__':
    region = None

    if len(sys.argv) == 2:
        region = sys.argv[1]

    print_ec2(region)