done

lib/python3.11/site-packages/numpy/fft/_helper.pyi

@@ -0,0 +1,45 @@
+from typing import Any, Final, TypeVar, overload
+from typing import Literal as L
+
+from numpy import complexfloating, floating, generic, integer
+from numpy._typing import (
+    ArrayLike,
+    NDArray,
+    _ArrayLike,
+    _ArrayLikeComplex_co,
+    _ArrayLikeFloat_co,
+    _ShapeLike,
+)
+
+__all__ = ["fftfreq", "fftshift", "ifftshift", "rfftfreq"]
+
+_ScalarT = TypeVar("_ScalarT", bound=generic)
+
+###
+
+integer_types: Final[tuple[type[int], type[integer]]] = ...
+
+###
+
+@overload
+def fftshift(x: _ArrayLike[_ScalarT], axes: _ShapeLike | None = None) -> NDArray[_ScalarT]: ...
+@overload
+def fftshift(x: ArrayLike, axes: _ShapeLike | None = None) -> NDArray[Any]: ...
+
+#
+@overload
+def ifftshift(x: _ArrayLike[_ScalarT], axes: _ShapeLike | None = None) -> NDArray[_ScalarT]: ...
+@overload
+def ifftshift(x: ArrayLike, axes: _ShapeLike | None = None) -> NDArray[Any]: ...
+
+#
+@overload
+def fftfreq(n: int | integer, d: _ArrayLikeFloat_co = 1.0, device: L["cpu"] | None = None) -> NDArray[floating]: ...
+@overload
+def fftfreq(n: int | integer, d: _ArrayLikeComplex_co = 1.0, device: L["cpu"] | None = None) -> NDArray[complexfloating]: ...
+
+#
+@overload
+def rfftfreq(n: int | integer, d: _ArrayLikeFloat_co = 1.0, device: L["cpu"] | None = None) -> NDArray[floating]: ...
+@overload
+def rfftfreq(n: int | integer, d: _ArrayLikeComplex_co = 1.0, device: L["cpu"] | None = None) -> NDArray[complexfloating]: ...