torcharrow.Column.drop_duplicates¶ Column.drop_duplicates(subset: ty.Union[str, ty.List[str], ty.Literal[None]] = None, keep: ty.Literal['first', 'last', False] = 'first')¶ (实验性 API) 从行/帧中删除重复值,但保留第一个、最后一个和无值