code: def __init__(self, scheme: Optional[str] = None) -> None:
      self._scheme = scheme or "s3"
      self._s3 = None
      self._cache = get_artifact_file_cache()
  
imports: import os
  import time
  from pathlib import PurePosixPath
  from typing import TYPE_CHECKING, Dict, Optional, Sequence, Tuple, Union
  from urllib.parse import parse_qsl, urlparse
  from wandb import util
  from wandb.errors import CommError
  from wandb.errors.term import termlog
  from wandb.sdk.artifacts.artifact_file_cache import get_artifact_file_cache
  from wandb.sdk.artifacts.artifact_manifest_entry import ArtifactManifestEntry
  from wandb.sdk.artifacts.storage_handler import DEFAULT_MAX_OBJECTS, StorageHandler
  from wandb.sdk.lib.hashutil import ETag
  from wandb.sdk.lib.paths import FilePathStr, StrPath, URIStr
label_desc: Use image node_id 1 to create a new S3Handler object from inherited base classes: StorageHandler with example: obj = S3Handler(scheme)