Copy blob from one GCS bucket to another

gcs-copyblob.py

def copy_blob(bucket_name, blob_name, new_bucket_name, new_blob_name):
    """Copies a blob from one bucket to another with a new name."""
    storage_client = storage.Client()
    source_bucket = storage_client.get_bucket(bucket_name)
    source_blob = source_bucket.blob(blob_name)
    destination_bucket = storage_client.get_bucket(new_bucket_name)

    new_blob = source_bucket.copy_blob(
        source_blob, destination_bucket, new_blob_name)

    print('Blob {} in bucket {} copied to blob {} in bucket {}.'.format(
        source_blob.name, source_bucket.name, new_blob.name,
        destination_bucket.name))