code: def hash(self):
      key = f"{self.fn.cache_key}-{self.attrs.hash()}-{self.signature.values()}-{self.constants}"
      return hashlib.md5(key.encode("utf-8")).hexdigest()
  
imports: from __future__ import annotations
  import hashlib
  import json
  from .._C.libtriton import get_env_vars, ir
  from ..backends import backends
  from ..None import __version__
  from ..runtime.autotuner import OutOfResources
  from ..runtime.cache import get_cache_manager
  from ..runtime.driver import driver
  from ..backends.nvidia.compiler import InfoFromBackendForTensorMap
  from dataclasses import dataclass
  from .code_generator import ast_to_ttir
  from pathlib import Path
  import re
  import functools
  import os
label_desc: Use image node_id 2 for calling the ASTSource obj's underlying member method code with example usage: obj.hash() and returns: hashlib