code: def _s3_uri(self, *subpath):
      joined_path = _join_path(self.root, *subpath)
      return f"s3://{self.bucket}/{joined_path}"
  
imports: import itertools
  import logging
  import os
  import subprocess
  import sys
  import uuid
  from guild import remote
  from guild import remote_util
  from guild import util
  from guild import var
  from .None import meta_sync
label_desc: Use image node_id 2 for calling the S3Remote obj's underlying member method code with example usage: obj._s3_uri() and returns: str, self, str, joined_path