code: def bucket_and_path(self, url):
          
          url = compat.as_str_any(url)
          if url.startswith("s3://"):
              url = url[len("s3://"):]
          idx = url.index("/")
          bucket = url[:idx]
          path = url[(idx + 1):]
          return bucket, path
docs: Split an S3-prefixed URL into bucket and path.