🗑️ interpolate: @deprecate the dfitpack functions

scipy-stubs/interpolate/dfitpack.pyi

@@ -1,5 +1,7 @@
 # This module is not meant for public use and will be removed in SciPy v2.0.0.
-from typing import Final
+
+from typing import Any, Final, Protocol, type_check_only
+from typing_extensions import deprecated
 
 __all__ = [
     "bispeu",
@@ -29,28 +31,43 @@ __all__ = [
     "types",
 ]
 
-bispeu: Final[object]
-bispev: Final[object]
-curfit: Final[object]
-dblint: Final[object]
-fpchec: Final[object]
-fpcurf0: Final[object]
-fpcurf1: Final[object]
-fpcurfm1: Final[object]
-parcur: Final[object]
-parder: Final[object]
-pardeu: Final[object]
-pardtc: Final[object]
-percur: Final[object]
-regrid_smth: Final[object]
-regrid_smth_spher: Final[object]
-spalde: Final[object]
-spherfit_lsq: Final[object]
-spherfit_smth: Final[object]
-splder: Final[object]
-splev: Final[object]
-splint: Final[object]
-sproot: Final[object]
-surfit_lsq: Final[object]
-surfit_smth: Final[object]
-types: Final[object]
+###
+
+@type_check_only
+class _DeprecatedFortranFunction(Protocol):
+    __name__: str
+
+    @deprecated(
+        "The `scipy.interpolate.dfitpack` namespace is deprecated and will be removed in SciPy 2.0.0. "
+        "Please use the `scipy.interpolate` namespace instead."
+    )
+    def __call__(self, /, *args: object, **kwds: object) -> Any: ...  # noqa: ANN401
+
+###
+
+bispeu: Final[_DeprecatedFortranFunction] = ...
+bispev: Final[_DeprecatedFortranFunction] = ...
+fpchec: Final[_DeprecatedFortranFunction] = ...
+fpcurf0: Final[_DeprecatedFortranFunction] = ...
+fpcurf1: Final[_DeprecatedFortranFunction] = ...
+fpcurfm1: Final[_DeprecatedFortranFunction] = ...
+dblint: Final[_DeprecatedFortranFunction] = ...
+parcur: Final[_DeprecatedFortranFunction] = ...
+parder: Final[_DeprecatedFortranFunction] = ...
+pardeu: Final[_DeprecatedFortranFunction] = ...
+pardtc: Final[_DeprecatedFortranFunction] = ...
+percur: Final[_DeprecatedFortranFunction] = ...
+regrid_smth: Final[_DeprecatedFortranFunction] = ...
+regrid_smth_spher: Final[_DeprecatedFortranFunction] = ...
+curfit: Final[_DeprecatedFortranFunction] = ...
+spherfit_lsq: Final[_DeprecatedFortranFunction] = ...
+spherfit_smth: Final[_DeprecatedFortranFunction] = ...
+surfit_lsq: Final[_DeprecatedFortranFunction] = ...
+surfit_smth: Final[_DeprecatedFortranFunction] = ...
+types: Final[_DeprecatedFortranFunction] = ...
+
+spalde: Final[_DeprecatedFortranFunction] = ...
+splder: Final[_DeprecatedFortranFunction] = ...
+splev: Final[_DeprecatedFortranFunction] = ...
+splint: Final[_DeprecatedFortranFunction] = ...
+sproot: Final[_DeprecatedFortranFunction] = ...

tests/interpolate/dfitpack.pyi

@@ -0,0 +1,6 @@
+# test the deprecations of the "fortran functions" of the deprecated `scipy.interpolate.dfitpack` namespace
+
+from scipy.interpolate import dfitpack
+
+dfitpack.spalde(1, 1, 1, 1)  # pyright: ignore[reportDeprecated]
+dfitpack.bispeu(1, 1, 1, 1, 1, 1, 1)  # pyright: ignore[reportDeprecated]