53 lines
1.8 KiB
Python
53 lines
1.8 KiB
Python
from __future__ import annotations
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from typing import TYPE_CHECKING
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from narwhals._arrow.expr import ArrowExpr
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from narwhals._compliant import CompliantSelector
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from narwhals._compliant import EagerSelectorNamespace
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if TYPE_CHECKING:
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from typing_extensions import Self
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from narwhals._arrow.dataframe import ArrowDataFrame
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from narwhals._arrow.series import ArrowSeries
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from narwhals._compliant import EvalNames
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from narwhals._compliant import EvalSeries
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from narwhals.utils import _FullContext
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class ArrowSelectorNamespace(EagerSelectorNamespace["ArrowDataFrame", "ArrowSeries"]):
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def _selector(
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self,
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call: EvalSeries[ArrowDataFrame, ArrowSeries],
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evaluate_output_names: EvalNames[ArrowDataFrame],
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/,
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) -> ArrowSelector:
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return ArrowSelector(
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call,
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depth=0,
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function_name="selector",
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evaluate_output_names=evaluate_output_names,
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alias_output_names=None,
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backend_version=self._backend_version,
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version=self._version,
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)
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def __init__(self: Self, context: _FullContext, /) -> None:
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self._implementation = context._implementation
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self._backend_version = context._backend_version
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self._version = context._version
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class ArrowSelector(CompliantSelector["ArrowDataFrame", "ArrowSeries"], ArrowExpr): # type: ignore[misc]
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def _to_expr(self: Self) -> ArrowExpr:
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return ArrowExpr(
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self._call,
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depth=self._depth,
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function_name=self._function_name,
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evaluate_output_names=self._evaluate_output_names,
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alias_output_names=self._alias_output_names,
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backend_version=self._backend_version,
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version=self._version,
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)
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