Find AMI image ID of latest Amazon Windows 2012R2 image

FindLatestWinAMI.py

def find_image(region):
    """
    Finds the latest Windows 2012R2 offical Amazon AMI and returns the ID
    """
    sys.stdout.write("\nFinding latest Windows 2012R2 image...")
    ec2 = boto3.resource('ec2', region_name = "{0}".format(region))
    images = ec2.images.filter(
        Owners=['amazon'],
        Filters=[
            {'Name': 'name','Values': ['Windows_Server-2012-R2_RTM-English-64Bit-Base-*']},
            {'Name': 'state', 'Values': ['available']},
            {'Name': 'architecture', 'Values': ['x86_64']},
            {'Name': 'root-device-type', 'Values': ['ebs']},
            {'Name': 'virtualization-type', 'Values': ['hvm']},
            {'Name': 'platform', 'Values': ['windows']},
            ]
    )
    candidates = {}
    for image in images:
        candidates[image.creation_date] = image.image_id
    cDate = sorted(candidates.keys(), reverse=True)[0]
    ami = candidates[cDate]
    print(" Selected {0}".format(ami))
    return(ami)