code: def keys(self) -> Iterator[int]:
      yield from self.tree.keys()
  
imports: import numpy
  from typing import Any, Iterator, List, Tuple, Union
  from aim.storage.treeview import TreeView
  from aim.storage.arrayview import ArrayView
label_desc: Use image node_id 4 for calling the TreeArrayView obj's underlying member method code with example usage: obj.keys() without return types