class_docstr: Interchange dataframe object.
class_docstr_tok: ["Interchange","dataframe","object","."]
docstr: Return the column names.
docstr_tok: ["Return","the","column","names","."]
code: def column_names(self) -> Iterable[str]:
      """Return the column names."""
  
imports: from __future__ import annotations
  from enum import IntEnum
  from typing import TYPE_CHECKING, Any, Iterable, Literal, Protocol, Sequence, Tuple, TypedDict
label_desc: Use image node_id 7 for calling the DataFrame obj's underlying member method code with example usage: obj.column_names() without return types