Explorer.DataFrame.from_csv problem

Questions & Help Questions
,
3 
{:ok, frame} = Explorer.DataFrame.from_csv(Path.relative_to_cwd(path), [
  infer_schema_length: 0,
  columns: [
    "datetime_ns"
  ],
  dtypes: [
    {"datetime_ns", {:u, 64}}
  ]
])

frame
|> Explorer.DataFrame.put("dataframe_ns", frame["datetime_ns"] |> Explorer.Series.cast({:naive_datetime, :nanosecond}))
|> IO.inspect()

=

#Explorer.DataFrame<
  Polars[1 x 2]
  datetime_ns u64 [1738573413286629810]
  dataframe_ns naive_datetime[ns] [2025-02-03 09:03:33.286629]
>