Add Name tag to S3 bucket same as bucket name

s3_tag_name.py

import boto3
s3 = boto3.client('s3')
response = s3.list_buckets()
buckets = [bucket['Name'] for bucket in response['Buckets']]

for bucket in buckets:
    print bucket
    tag={'TagSet':[{'Key': 'Name', 'Value': bucket}]}
    try:
        response = s3.put_bucket_tagging(Bucket=bucket, Tagging=tag)
    except:
        print bucket + " - broken"