53 lines
1.6 KiB
Python
53 lines
1.6 KiB
Python
from __future__ import annotations
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from typing import TYPE_CHECKING
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from narwhals._compliant import CompliantSelector
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from narwhals._compliant import LazySelectorNamespace
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from narwhals._duckdb.expr import DuckDBExpr
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if TYPE_CHECKING:
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import duckdb
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from typing_extensions import Self
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from narwhals._compliant import EvalNames
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from narwhals._compliant import EvalSeries
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from narwhals._duckdb.dataframe import DuckDBLazyFrame
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from narwhals.utils import _FullContext
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class DuckDBSelectorNamespace(
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LazySelectorNamespace["DuckDBLazyFrame", "duckdb.Expression"]
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):
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def _selector(
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self,
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call: EvalSeries[DuckDBLazyFrame, duckdb.Expression],
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evaluate_output_names: EvalNames[DuckDBLazyFrame],
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/,
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) -> DuckDBSelector:
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return DuckDBSelector(
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call,
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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 DuckDBSelector( # type: ignore[misc]
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CompliantSelector["DuckDBLazyFrame", "duckdb.Expression"], DuckDBExpr
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):
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def _to_expr(self: Self) -> DuckDBExpr:
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return DuckDBExpr(
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self._call,
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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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