如何使用 boto3 在不删除现有标签的情况下向 S3 存储桶添加标签？

Question

我正在使用这个功能：

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

它正在删除现有标签，我只能看到一个标签。

Answer 1

我会使用以下

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})

这将获取现有标签，添加一个新标签，然后将它们全部放回原处。

Answer 2

我遇到了同样的问题并用我自己的方法解决了它：

import boto3

def set_object_keys(bucket, key, update=True, **new_tags):
    """
    Add/Update/Overwrite tags to AWS S3 Object

    :param bucket_key: Name of the S3 Bucket
    :param update: If True: appends new tags else overwrites all tags with **kwargs
    :param new_tags: A dictionary of key:value pairs 
    :return: True if successful 
    """

    #  I prefer to have this var outside of the method. Added for completeness
    client = boto3.client('s3')   

    old_tags = {}

    if update:
        old = client.get_object_tagging(
            Bucket=bucket,
            Key=key,
        )

        old_tags = {i['Key']: i['Value'] for i in old['TagSet']}

    new_tags = {**old_tags, **new_tags}

    response = client.put_object_tagging(
        Bucket=bucket,
        Key=key,
        Tagging={
            'TagSet': [{'Key': str(k), 'Value': str(v)} for k, v in new_tags.items()]
        }
    )

    return response['ResponseMetadata']['HTTPStatusCode'] == 200

然后在函数调用中添加标签：

set_object_keys(....., name="My Name", colour="purple")

这将添加新标签并更新现有标签