code: def _s3_uri(args):
      m = re.match(r"s3://([^/]+)(.*)", args.uri)
      if not m:
          cli.error("URI must be in the format s3://BUCKET[/PATH]")
      bucket, path = m.groups()
      if path[-1:] == "/":
          path = path[:-1]
      if path:
          return f"s3://{bucket}/{path}"
      return f"s3://{bucket}"
  
file_path: guildai/guild/commands/s3_sync_impl.py
imports: import subprocess
  import re
  import time
  from guild import cli
  from guild import util
  from guild import var
  from .None import service_impl_support
label_desc: Use image node_id 4 for calling a global function with example usage: _s3_uri(args) and returns: str, bucket, str, bucket, str, path