title: Transfer buckets from S3 to GCS and reverse as well using python3 without downloading the buckets first?
body: <p>I know there's the gsutil which im looking into now.
  But I'm trying to figure out if there is a way to transfer buckets from aws s3 to gcs and from gcs to s3 without having to download all the data locally from one and then and then re-up it.</p>