Tag Buckets with BucketName

import boto3
import botocore
s3_client = boto3.client('s3')
s3_resource = boto3.resource('s3')


def get_bucket_names():
    bucket_names = []
    for bucket in s3_client.list_buckets().get('Buckets'):
        bucket_names.append(bucket.get('Name'))
    return bucket_names


def tag_bucket_with_name(bucket_name):
    bucket_tagging = s3_resource.BucketTagging(bucket_name)
    try:
        tags = bucket_tagging.tag_set
    except botocore.exceptions.ClientError as e:
        print('No tags exist for %s' % bucket_name)
        tags = []
    if not any(d['Key'] == 'BucketName' for d in tags):
        tags.append({'Key': 'BucketName', 'Value': bucket_name})
    set_tag = bucket_tagging.put(Tagging={'TagSet': tags})
    if set_tag.get('ResponseMetadata').get('HTTPStatusCode') == 204:
        print('Tags Set for %s' % bucket_name)

if __name__ == "__main__":
    for name in get_bucket_names():
        tag_bucket_with_name(name)