Merge pull request #12 from espdev/drop-py35

v0.9.0

* Drop support of Python 3.5
* `weights`, `smooth` and `axis` arguments in `csaps` function are keyword-only now
* `UnivariateCubicSmoothingSpline` and `MultivariateCubicSmoothingSpline` classes are deprecated and will be removed in 1.0.0 version. Use `CubicSmoothingSpline` instead.

Author: espdev

.travis.yml

@@ -3,8 +3,6 @@ language: python
 
 matrix:
   include:
-    - python: "3.5"
-      env: TOXENV=py35-pytest
     - python: "3.6"
       env: TOXENV=py36-pytest
     - python: "3.7"

CHANGELOG.md

@@ -1,5 +1,12 @@
 # Changelog
 
+## v0.9.0
+
+* Drop support of Python 3.5
+* `weights`, `smooth` and `axis` arguments in `csaps` function are keyword-only now
+* `UnivariateCubicSmoothingSpline` and `MultivariateCubicSmoothingSpline` classes are deprecated 
+  and will be removed in 1.0.0 version. Use `CubicSmoothingSpline` instead.
+
 ## v0.8.0
 
 * Add `csaps` function that can be used as the main API

README.md

@@ -11,7 +11,7 @@
 
 ## Installation
 
-Python 3.5 or above is supported.
+Python 3.6 or above is supported.
 
 ```
 pip install -U csaps

csaps/__init__.py

@@ -13,6 +13,7 @@
 )
 from csaps._sspumv import (
     SplinePPForm,
+    CubicSmoothingSpline,
     UnivariateCubicSmoothingSpline,
     MultivariateCubicSmoothingSpline,
 )
@@ -38,6 +39,7 @@
     'ISmoothingSpline',
     'SplinePPForm',
     'NdGridSplinePPForm',
+    'CubicSmoothingSpline',
     'UnivariateCubicSmoothingSpline',
     'MultivariateCubicSmoothingSpline',
     'NdGridCubicSmoothingSpline',

csaps/_base.py

@@ -10,7 +10,7 @@
 
 import numpy as np
 
-from csaps._types import TData, TProps, TSmooth, TXi, TSpline
+from ._types import TData, TProps, TSmooth, TXi, TSpline
 
 
 class SplinePPFormBase(abc.ABC, ty.Generic[TData, TProps]):
@@ -87,17 +87,15 @@ def evaluate(self, xi: TData) -> np.ndarray:
             Interpolated/smoothed data
         """
 
-    def __repr__(self):
+    def __repr__(self):  # pragma: no cover
         return (
-            '{}\n'
-            '  breaks: {}\n'
-            '  coeffs: {} shape\n'
-            '  pieces: {}\n'
-            '  order: {}\n'
-            '  ndim: {}\n'
-        ).format(
-            type(self).__name__, self.breaks, self.coeffs.shape,
-            self.pieces, self.order, self.ndim)
+            f'{type(self).__name__}\n'
+            f'  breaks: {self.breaks}\n'
+            f'  coeffs: {self.coeffs.shape} shape\n'
+            f'  pieces: {self.pieces}\n'
+            f'  order: {self.order}\n'
+            f'  ndim: {self.ndim}\n'
+        )
 
 
 class ISmoothingSpline(abc.ABC, ty.Generic[TSpline, TSmooth, TXi]):

csaps/_utils.py csaps/_reshape.pycsaps/_utils.py renamed to csaps/_reshape.py

@@ -64,8 +64,8 @@ def to_2d(arr: np.ndarray, axis: int) -> np.ndarray:
     arr = np.asarray(arr)
     axis = arr.ndim + axis if axis < 0 else axis
 
-    if axis >= arr.ndim:
-        raise ValueError('axis {} is out of array axes {}'.format(axis, arr.ndim))
+    if axis >= arr.ndim:  # pragma: no cover
+        raise ValueError(f'axis {axis} is out of array axes {arr.ndim}')
 
     tr_axes = list(range(arr.ndim))
     tr_axes.pop(axis)
@@ -135,8 +135,8 @@ def from_2d(arr: np.ndarray, shape: ty.Sequence[int], axis: int) -> np.ndarray:
     ndim = len(shape)
     axis = ndim + axis if axis < 0 else axis
 
-    if axis >= ndim:
-        raise ValueError('axis {} is out of N-D array axes {}'.format(axis, ndim))
+    if axis >= ndim:  # pragma: no cover
+        raise ValueError(f'axis {axis} is out of N-D array axes {ndim}')
 
     new_shape = list(shape)
     new_shape.pop(axis)

csaps/_shortcut.py

@@ -10,10 +10,10 @@
 
 import numpy as np
 
-from csaps._base import ISmoothingSpline
-from csaps._sspumv import UnivariateCubicSmoothingSpline
-from csaps._sspndg import ndgrid_prepare_data_sites, NdGridCubicSmoothingSpline
-from csaps._types import (
+from ._base import ISmoothingSpline
+from ._sspumv import CubicSmoothingSpline
+from ._sspndg import ndgrid_prepare_data_sites, NdGridCubicSmoothingSpline
+from ._types import (
     UnivariateDataType,
     UnivariateVectorizedDataType,
     NdGridDataType,
@@ -25,11 +25,16 @@
 _WeightsDataType = Optional[Union[UnivariateDataType, NdGridDataType]]
 _SmoothDataType = Optional[Union[float, Sequence[Optional[float]]]]
 
-AutoSmoothingResult = NamedTuple('AutoSmoothingResult', [
-    ('values', _YDataType),
-    ('smooth', _SmoothDataType),
-])
-"""The result for auto smoothing for `csaps` function"""
+
+class AutoSmoothingResult(NamedTuple):
+    """The result for auto smoothing for `csaps` function"""
+
+    values: _YDataType
+    """Smoothed data values"""
+
+    smooth: _SmoothDataType
+    """The calculated smoothing parameter"""
+
 
 _ReturnType = Union[
     _YDataType,
@@ -41,6 +46,7 @@
 def csaps(xdata: _XDataType,
           ydata: _YDataType,
           xidata: _XiDataType = None,
+          *,
           weights: _WeightsDataType = None,
           smooth: _SmoothDataType = None,
           axis: Optional[int] = None) -> _ReturnType:
@@ -105,7 +111,7 @@ def csaps(xdata: _XDataType,
 
     ssp_obj : ISmoothingSpline
         Smoothing spline object if ``xidata`` was not set:
-            - :class:`UnivariateCubicSmoothingSpline` instance for univariate/multivariate data
+            - :class:`CubicSmoothingSpline` instance for univariate/multivariate data
             - :class:`NdGridCubicSmoothingSpline` instance for nd-gridded data
 
     Examples
@@ -134,7 +140,7 @@ def csaps(xdata: _XDataType,
     See Also
     --------
 
-    UnivariateCubicSmoothingSpline
+    CubicSmoothingSpline
     NdGridCubicSmoothingSpline
 
     """
@@ -151,7 +157,7 @@ def csaps(xdata: _XDataType,
 
     if umv:
         axis = -1 if axis is None else axis
-        sp = UnivariateCubicSmoothingSpline(xdata, ydata, weights, smooth, axis)
+        sp = CubicSmoothingSpline(xdata, ydata, weights, smooth, axis)
     else:
         sp = NdGridCubicSmoothingSpline(xdata, ydata, weights, smooth)
 

csaps/_sspndg.py

@@ -10,24 +10,23 @@
 
 import numpy as np
 
-from csaps._base import SplinePPFormBase, ISmoothingSpline
-from csaps._types import UnivariateDataType, NdGridDataType
-from csaps._sspumv import SplinePPForm, UnivariateCubicSmoothingSpline
+from ._base import SplinePPFormBase, ISmoothingSpline
+from ._types import UnivariateDataType, NdGridDataType
+from ._sspumv import SplinePPForm, CubicSmoothingSpline
 
 
 def ndgrid_prepare_data_sites(data, name) -> ty.Tuple[np.ndarray, ...]:
     if not isinstance(data, c_abc.Sequence):
-        raise TypeError("'{}' must be a sequence of the vectors.".format(name))
+        raise TypeError(f"'{name}' must be a sequence of the vectors.")
 
     data = list(data)
 
     for i, di in enumerate(data):
         di = np.array(di, dtype=np.float64)
         if di.ndim > 1:
-            raise ValueError("All '{}' elements must be a vector.".format(name))
+            raise ValueError(f"All '{name}' elements must be a vector.")
         if di.size < 2:
-            raise ValueError(
-                "'{}' must contain at least 2 data points.".format(name))
+            raise ValueError(f"'{name}' must contain at least 2 data points.")
         data[i] = di
 
     return tuple(data)
@@ -165,28 +164,24 @@ def _prepare_data(cls, xdata, ydata, weights, smooth):
         data_ndim = len(xdata)
 
         if ydata.ndim != data_ndim:
-            raise ValueError(
-                'ydata must have dimension {} according to xdata'.format(data_ndim))
+            raise ValueError(f'ydata must have dimension {data_ndim} according to xdata')
 
         for yd, xs in zip(ydata.shape, map(len, xdata)):
             if yd != xs:
-                raise ValueError(
-                    'ydata ({}) and xdata ({}) dimension size mismatch'.format(yd, xs))
+                raise ValueError(f'ydata ({yd}) and xdata ({xs}) dimension size mismatch')
 
         if not weights:
             weights = [None] * data_ndim
         else:
             weights = ndgrid_prepare_data_sites(weights, 'weights')
 
         if len(weights) != data_ndim:
-            raise ValueError(
-                'weights ({}) and xdata ({}) dimensions mismatch'.format(len(weights), data_ndim))
+            raise ValueError(f'weights ({len(weights)}) and xdata ({data_ndim}) dimensions mismatch')
 
         for w, x in zip(weights, xdata):
             if w is not None:
                 if w.size != x.size:
-                    raise ValueError(
-                        'weights ({}) and xdata ({}) dimension size mismatch'.format(w, x))
+                    raise ValueError(f'weights ({w}) and xdata ({x}) dimension size mismatch')
 
         if not smooth:
             smooth = [None] * data_ndim
@@ -198,8 +193,8 @@ def _prepare_data(cls, xdata, ydata, weights, smooth):
 
         if len(smooth) != data_ndim:
             raise ValueError(
-                'Number of smoothing parameter values must be equal '
-                'number of dimensions ({})'.format(data_ndim))
+                f'Number of smoothing parameter values must '
+                f'be equal number of dimensions ({data_ndim})')
 
         return xdata, ydata, weights, smooth
 
@@ -208,9 +203,8 @@ def __call__(self, xi: NdGridDataType) -> np.ndarray:
         """
         xi = ndgrid_prepare_data_sites(xi, 'xi')
 
-        if len(xi) != self._ndim:
-            raise ValueError(
-                'xi ({}) and xdata ({}) dimensions mismatch'.format(len(xi), self._ndim))
+        if len(xi) != self._ndim:  # pragma: no cover
+            raise ValueError(f'xi ({len(xi)}) and xdata ({self._ndim}) dimensions mismatch')
 
         return self._spline.evaluate(xi)
 
@@ -224,8 +218,8 @@ def _make_spline(self, smooth: ty.List[ty.Optional[float]]) -> ty.Tuple[NdGridSp
             shape_i = (np.prod(sizey[:-1]), sizey[-1])
             ydata_i = ydata.reshape(shape_i, order='F')
 
-            s = UnivariateCubicSmoothingSpline(
-                self._xdata[i], ydata_i, self._weights[i], smooth[i])
+            s = CubicSmoothingSpline(
+                self._xdata[i], ydata_i, weights=self._weights[i], smooth=smooth[i])
 
             _smooth.append(s.smooth)
             sizey[-1] = s.spline.pieces * s.spline.order