33 lines
1 KiB
Python
33 lines
1 KiB
Python
from __future__ import annotations
|
|
|
|
from typing import TYPE_CHECKING
|
|
|
|
from narwhals._compliant import CompliantSelector, LazySelectorNamespace
|
|
from narwhals._duckdb.expr import DuckDBExpr
|
|
|
|
if TYPE_CHECKING:
|
|
from duckdb import Expression # noqa: F401
|
|
|
|
from narwhals._duckdb.dataframe import DuckDBLazyFrame # noqa: F401
|
|
from narwhals._duckdb.expr import DuckDBWindowFunction
|
|
|
|
|
|
class DuckDBSelectorNamespace(LazySelectorNamespace["DuckDBLazyFrame", "Expression"]):
|
|
@property
|
|
def _selector(self) -> type[DuckDBSelector]:
|
|
return DuckDBSelector
|
|
|
|
|
|
class DuckDBSelector( # type: ignore[misc]
|
|
CompliantSelector["DuckDBLazyFrame", "Expression"], DuckDBExpr
|
|
):
|
|
_window_function: DuckDBWindowFunction | None = None
|
|
|
|
def _to_expr(self) -> DuckDBExpr:
|
|
return DuckDBExpr(
|
|
self._call,
|
|
self._window_function,
|
|
evaluate_output_names=self._evaluate_output_names,
|
|
alias_output_names=self._alias_output_names,
|
|
version=self._version,
|
|
)
|