class_docstr: A Python execution environment.
  
  Encapsulates a namespace for variable lookup
class_docstr_tok: ["A","Python","execution","environment",".","Encapsulates","a","namespace","for","variable","lookup"]
code: def _namespace_ids(self):
      return [id(n) for n in self.namespaces]
  
imports: from __future__ import annotations
  from collections.abc import MutableMapping
  from contextlib import suppress
  from dataclasses import dataclass
  from functools import lru_cache
  from typing import TYPE_CHECKING
label_desc: Use image node_id 5 for calling the Environment obj's underlying member method code with example usage: obj._namespace_ids() and returns: unknown