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from __future__ import annotations
from typing import TYPE_CHECKING
from narwhals._duckdb.utils import DeferredTimeZone, native_to_narwhals_dtype
from narwhals.dependencies import get_duckdb
if TYPE_CHECKING:
from types import ModuleType
import duckdb
from typing_extensions import Never, Self
from narwhals._utils import Version
from narwhals.dtypes import DType
class DuckDBInterchangeSeries:
def __init__(self, df: duckdb.DuckDBPyRelation, version: Version) -> None:
self._native_series = df
self._version = version
def __narwhals_series__(self) -> Self:
return self
def __native_namespace__(self) -> ModuleType:
return get_duckdb() # type: ignore[no-any-return]
@property
def dtype(self) -> DType:
return native_to_narwhals_dtype(
self._native_series.types[0],
self._version,
DeferredTimeZone(self._native_series),
)
def __getattr__(self, attr: str) -> Never:
msg = ( # pragma: no cover
f"Attribute {attr} is not supported for interchange-level dataframes.\n\n"
"If you would like to see this kind of object better supported in "
"Narwhals, please open a feature request "
"at https://github.com/narwhals-dev/narwhals/issues."
)
raise NotImplementedError(msg) # pragma: no cover
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