Update type-hints

csaps/_base.py

@@ -2,7 +2,7 @@
 The base classes and interfaces
 """
 
-from typing import Generic, Optional, Tuple
+from typing import Generic
 import abc
 
 import numpy as np
@@ -72,7 +72,7 @@ def ndim(self) -> int:
 
     @property
     @abc.abstractmethod
-    def shape(self) -> Tuple[int, ...]:
+    def shape(self) -> tuple[int, ...]:
         """Returns the source data shape
 
         Returns
@@ -101,7 +101,7 @@ def spline(self) -> TSpline:
     def __call__(
         self,
         xi: TXi,
-        nu: Optional[TNu] = None,
-        extrapolate: Optional[TExtrapolate] = None,
+        nu: TNu | None = None,
+        extrapolate: TExtrapolate | None = None,
     ) -> FloatNDArrayType:
         """Evaluates spline on the data sites"""

csaps/_reshape.py

@@ -1,4 +1,3 @@
-import typing as ty
 import functools
 from itertools import chain
 import operator
@@ -158,7 +157,7 @@ def umv_coeffs_to_flatten(arr: np.ndarray):
     return arr_view
 
 
-def ndg_coeffs_to_canonical(arr: np.ndarray, pieces: ty.Tuple[int, ...]) -> np.ndarray:
+def ndg_coeffs_to_canonical(arr: np.ndarray, pieces: tuple[int, ...]) -> np.ndarray:
     """Returns array canonical view for given n-d grid coeffs flatten array
 
     Creates n-d array canonical view with shape (k0, ..., kn, p0, ..., pn) for given

csaps/_shortcut.py

@@ -2,8 +2,7 @@
 The module provided `csaps` shortcut function for smoothing data
 """
 
-from typing import NamedTuple, Optional, Sequence, Union, overload
-from collections import abc as c_abc
+from typing import NamedTuple, Sequence, overload
 
 import numpy as np
 
@@ -19,7 +18,7 @@ class AutoSmoothingResult(NamedTuple):
     values: MultivariateDataType
     """Smoothed data values"""
 
-    smooth: Union[float, Sequence[Optional[float]]]
+    smooth: float | Sequence[float | None]
     """The calculated smoothing parameter"""
 
 
@@ -33,9 +32,9 @@ def csaps(
     xdata: UnivariateDataType,
     ydata: MultivariateDataType,
     *,
-    weights: Optional[UnivariateDataType] = None,
-    smooth: Optional[float] = None,
-    axis: Optional[int] = None,
+    weights: UnivariateDataType | None = None,
+    smooth: float | None = None,
+    axis: int | None = None,
     normalizedsmooth: bool = False,
 ) -> ISmoothingSpline:  # pragma: no cover
     ...
@@ -47,8 +46,8 @@ def csaps(
     ydata: MultivariateDataType,
     xidata: UnivariateDataType,
     *,
-    weights: Optional[UnivariateDataType] = None,
-    axis: Optional[int] = None,
+    weights: UnivariateDataType | None = None,
+    axis: int | None = None,
     normalizedsmooth: bool = False,
 ) -> AutoSmoothingResult:  # pragma: no cover
     ...
@@ -61,8 +60,8 @@ def csaps(
     xidata: UnivariateDataType,
     *,
     smooth: float,
-    weights: Optional[UnivariateDataType] = None,
-    axis: Optional[int] = None,
+    weights: UnivariateDataType | None = None,
+    axis: int | None = None,
     normalizedsmooth: bool = False,
 ) -> MultivariateDataType:  # pragma: no cover
     ...
@@ -73,9 +72,9 @@ def csaps(
     xdata: SequenceUnivariateDataType,
     ydata: MultivariateDataType,
     *,
-    weights: Optional[SequenceUnivariateDataType] = None,
-    smooth: Optional[Sequence[float]] = None,
-    axis: Optional[int] = None,
+    weights: SequenceUnivariateDataType | None = None,
+    smooth: Sequence[float | None] | None = None,
+    axis: int | None = None,
     normalizedsmooth: bool = False,
 ) -> ISmoothingSpline:  # pragma: no cover
     ...
@@ -87,8 +86,8 @@ def csaps(
     ydata: MultivariateDataType,
     xidata: SequenceUnivariateDataType,
     *,
-    weights: Optional[SequenceUnivariateDataType] = None,
-    axis: Optional[int] = None,
+    weights: SequenceUnivariateDataType | None = None,
+    axis: int | None = None,
     normalizedsmooth: bool = False,
 ) -> AutoSmoothingResult:  # pragma: no cover
     ...
@@ -100,9 +99,9 @@ def csaps(
     ydata: MultivariateDataType,
     xidata: SequenceUnivariateDataType,
     *,
-    smooth: Sequence[float],
-    weights: Optional[SequenceUnivariateDataType] = None,
-    axis: Optional[int] = None,
+    smooth: Sequence[float | None],
+    weights: SequenceUnivariateDataType | None = None,
+    axis: int | None = None,
     normalizedsmooth: bool = False,
 ) -> MultivariateDataType:  # pragma: no cover
     ...
@@ -224,8 +223,8 @@ def csaps(
     """
 
     umv = True
-    if isinstance(xdata, c_abc.Sequence):
-        if len(xdata) and isinstance(xdata[0], (np.ndarray, c_abc.Sequence)):
+    if isinstance(xdata, Sequence):
+        if len(xdata) and isinstance(xdata[0], (np.ndarray, Sequence)):
             umv = False
 
     if umv:

csaps/_sspndg.py

@@ -2,8 +2,7 @@
 ND-Gridded cubic smoothing spline implementation
 """
 
-from typing import Optional, Sequence, Tuple, Union, cast
-import collections.abc as c_abc
+from typing import Optional, Sequence, cast
 
 import numpy as np
 from scipy.interpolate import NdPPoly, PPoly
@@ -24,8 +23,8 @@ def ndgrid_prepare_data_vectors(
     data: SequenceUnivariateDataType,
     name: str,
     min_size: int = 2,
-) -> Tuple[Float1DArrayTupe, ...]:
-    if not isinstance(data, c_abc.Sequence):
+) -> tuple[Float1DArrayTupe, ...]:
+    if not isinstance(data, Sequence):
         raise TypeError(f"'{name}' must be a sequence of 1-d array-like (vectors) or scalars.")
 
     data_: list[Float1DArrayTupe] = []
@@ -41,7 +40,7 @@ def ndgrid_prepare_data_vectors(
     return tuple(data_)
 
 
-class NdGridSplinePPForm(ISplinePPForm[Tuple[np.ndarray, ...], Tuple[int, ...]], NdPPoly):
+class NdGridSplinePPForm(ISplinePPForm[tuple[np.ndarray, ...], tuple[int, ...]], NdPPoly):
     """N-D grid spline representation in PP-form
 
     N-D grid spline is represented in piecewise tensor product polynomial form.
@@ -56,33 +55,33 @@ class NdGridSplinePPForm(ISplinePPForm[Tuple[np.ndarray, ...], Tuple[int, ...]],
     __module__ = 'csaps'
 
     @property
-    def breaks(self) -> Tuple[np.ndarray, ...]:
+    def breaks(self) -> tuple[np.ndarray, ...]:
         return self.x
 
     @property
     def coeffs(self) -> np.ndarray:
         return self.c
 
     @property
-    def order(self) -> Tuple[int, ...]:
+    def order(self) -> tuple[int, ...]:
         return self.c.shape[: self.c.ndim // 2]
 
     @property
-    def pieces(self) -> Tuple[int, ...]:
+    def pieces(self) -> tuple[int, ...]:
         return self.c.shape[self.c.ndim // 2 :]
 
     @property
     def ndim(self) -> int:
         return len(self.x)
 
     @property
-    def shape(self) -> Tuple[int, ...]:
+    def shape(self) -> tuple[int, ...]:
         return tuple(len(xi) for xi in self.x)
 
     def __call__(  # type: ignore[override]
         self,
         x: SequenceUnivariateDataType,
-        nu: Optional[Tuple[int, ...]] = None,
+        nu: Optional[tuple[int, ...]] = None,
         extrapolate: Optional[bool] = None,
     ) -> np.ndarray:
         """Evaluate the spline for given data
@@ -160,9 +159,9 @@ def __repr__(self):  # pragma: no cover
 class NdGridCubicSmoothingSpline(
     ISmoothingSpline[
         NdGridSplinePPForm,
-        Tuple[float, ...],
+        tuple[float, ...],
         SequenceUnivariateDataType,
-        Tuple[int, ...],
+        tuple[int, ...],
         bool,
     ]
 ):
@@ -209,8 +208,8 @@ def __init__(
         self,
         xdata: SequenceUnivariateDataType,
         ydata: np.ndarray,
-        weights: Optional[SequenceUnivariateDataType] = None,
-        smooth: Optional[Union[float, Sequence[Optional[float]]]] = None,
+        weights: SequenceUnivariateDataType | None = None,
+        smooth: float | Sequence[float | None] | None = None,
         normalizedsmooth: bool = False,
     ) -> None:
         x, y, w, s = self._prepare_data(xdata, ydata, weights, smooth)
@@ -220,8 +219,8 @@ def __init__(
     def __call__(
         self,
         x: SequenceUnivariateDataType,
-        nu: Optional[Tuple[int, ...]] = None,
-        extrapolate: Optional[bool] = None,
+        nu: tuple[int, ...] | None = None,
+        extrapolate: bool | None = None,
     ) -> FloatNDArrayType:
         """Evaluate the spline for given data
 
@@ -249,12 +248,12 @@ def __call__(
         return self._spline(x, nu=nu, extrapolate=extrapolate)
 
     @property
-    def smooth(self) -> Tuple[float, ...]:
+    def smooth(self) -> tuple[float, ...]:
         """Returns a tuple of smoothing parameters for each axis
 
         Returns
         -------
-        smooth : Tuple[float, ...]
+        smooth : tuple[float, ...]
             The smoothing parameter in the range ``[0, 1]`` for each axis
         """
         return self._smooth
@@ -299,7 +298,7 @@ def _prepare_data(cls, xdata, ydata, weights, smooth):
         if smooth is None:
             smooth = [None] * data_ndim
 
-        if not isinstance(smooth, c_abc.Sequence):
+        if not isinstance(smooth, Sequence):
             smooth = [float(smooth)] * data_ndim
         else:
             smooth = list(smooth)

csaps/_sspumv.py

@@ -2,7 +2,7 @@
 Univariate/multivariate cubic smoothing spline implementation
 """
 
-from typing import List, Optional, Tuple, Union, Literal, cast
+from typing import Literal, cast
 import functools
 
 import numpy as np
@@ -57,9 +57,9 @@ def ndim(self) -> int:
         return prod(shape)
 
     @property
-    def shape(self) -> Tuple[int, ...]:
+    def shape(self) -> tuple[int, ...]:
         """Returns the source data shape"""
-        shape: List[int] = list(self.c.shape[2:])
+        shape: list[int] = list(self.c.shape[2:])
         shape.insert(self.axis, self.c.shape[1] + 1)
 
         return tuple(shape)
@@ -83,7 +83,7 @@ class CubicSmoothingSpline(
         float,
         UnivariateDataType,
         int,
-        Union[bool, Literal['periodic']],
+        bool | Literal['periodic'],
     ]
 ):
     """Cubic smoothing spline
@@ -126,8 +126,8 @@ def __init__(
         self,
         xdata: UnivariateDataType,
         ydata: MultivariateDataType,
-        weights: Optional[UnivariateDataType] = None,
-        smooth: Optional[float] = None,
+        weights: UnivariateDataType | None = None,
+        smooth: float | None = None,
         axis: int = -1,
         normalizedsmooth: bool = False,
     ) -> None:
@@ -138,8 +138,8 @@ def __init__(
     def __call__(
         self,
         x: UnivariateDataType,
-        nu: Optional[int] = None,
-        extrapolate: Optional[Union[bool, Literal['periodic']]] = None,
+        nu: int | None = None,
+        extrapolate: bool | Literal['periodic'] | None = None,
     ) -> FloatNDArrayType:
         """Evaluate the spline for given data
 
@@ -242,7 +242,7 @@ def trace(m: sp.dia_matrix):
         return 1.0 / (1.0 + trace(a) / (6.0 * trace(b)))
 
     @staticmethod
-    def _normalize_smooth(x: np.ndarray, w: np.ndarray, smooth: Optional[float]):
+    def _normalize_smooth(x: np.ndarray, w: np.ndarray, smooth: float | None) -> float:
         """
         See the explanation here: https://github.com/espdev/csaps/pull/47
         """