done

lib/python3.11/site-packages/narwhals/_duckdb/expr_struct.py

@@ -0,0 +1,19 @@
+from __future__ import annotations
+
+from typing import TYPE_CHECKING
+
+from narwhals._compliant import LazyExprNamespace
+from narwhals._compliant.any_namespace import StructNamespace
+from narwhals._duckdb.utils import F, lit
+
+if TYPE_CHECKING:
+    from narwhals._duckdb.expr import DuckDBExpr
+
+
+class DuckDBExprStructNamespace(
+    LazyExprNamespace["DuckDBExpr"], StructNamespace["DuckDBExpr"]
+):
+    def field(self, name: str) -> DuckDBExpr:
+        return self.compliant._with_elementwise(
+            lambda expr: F("struct_extract", expr, lit(name))
+        ).alias(name)