code: def remote_for_spec(self, spec):
      bucket, root = _parse_spec(spec)
      assert root.startswith("/")
      name = _remote_name(bucket, root)
      config = remotelib.RemoteConfig(
          {
              "bucket": bucket,
              "root": root,
          }
      )
      return S3Remote(name, config)
  
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 3 for calling the S3RemoteType obj's underlying member method code with example usage: obj.remote_for_spec(spec) and returns: S3Remote