How to add tags to an S3 Bucket without deleting the existing tags using boto3?

Question

I am using this function:

s3 = boto3.resource('s3')
bucket_tagging = s3.BucketTagging(bucket)
Set_Tag = bucket_tagging.put(Tagging={'TagSet':[{'Key':'Owner', 'Value': owner}]})

It is deleting the existing tags and I can see only one tag.

Answer 1

I would use the following

s3 = boto3.resource('s3')
bucket_tagging = s3.BucketTagging('bucket_name')
tags = bucket_tagging.tag_set
tags.append({'Key':'Owner', 'Value': owner})
Set_Tag = bucket_tagging.put(Tagging={'TagSet':tags})

This gets the existing tags, adds a new one, and then puts them all back in.