Add positional-only and keyword-only parameter markers to ufuncs (#2660)

The PR add missing the positional-only and the keyword-only parameter
markers, aligning signature of the ufuncs with NumPy.

Author: antonwolfy

CHANGELOG.md

@@ -30,6 +30,7 @@ Also, that release drops support for Python 3.9, making Python 3.10 the minimum
 * Changed the license from `BSD-2-Clause` to `BSD-3-Clause` [#2593](https://github.com/IntelPython/dpnp/pull/2593)
 * Defined explicit versions range of the Python interpreter which is needed during the build [#2634](https://github.com/IntelPython/dpnp/pull/2634)
 * Aligned documentation with NumPy and CuPy style by using short function names [#2633](https://github.com/IntelPython/dpnp/pull/2633)
+* Added the missing positional-only and keyword-only parameter markers to bring the ufunc signatures into alignment with NumPy [#2660](https://github.com/IntelPython/dpnp/pull/2660)
 
 ### Deprecated
 

dpnp/dpnp_algo/dpnp_elementwise_common.py

@@ -149,7 +149,9 @@ def _call_func(src, dst, sycl_queue, depends=None):
     def __call__(
         self,
         x,
+        /,
         out=None,
+        *,
         where=True,
         order="K",
         dtype=None,
@@ -542,7 +544,9 @@ def __call__(
         self,
         x1,
         x2,
+        /,
         out=None,
+        *,
         where=True,
         order="K",
         dtype=None,
@@ -746,7 +750,7 @@ def __init__(
             mkl_impl_fn=mkl_impl_fn,
         )
 
-    def __call__(self, x, deg=False, out=None, order="K"):
+    def __call__(self, x, /, deg=False, *, out=None, order="K"):
         res = super().__call__(x, out=out, order=order)
         if deg is True:
             res *= 180 / dpnp.pi
@@ -770,7 +774,7 @@ def __init__(
             docs,
         )
 
-    def __call__(self, x, out=None, order="K"):
+    def __call__(self, x, /, out=None, *, order="K"):
         if not dpnp.is_supported_array_type(x):
             pass  # pass to raise error in main implementation
         elif dpnp.issubdtype(x.dtype, dpnp.inexact):
@@ -816,7 +820,7 @@ def __init__(
             mkl_impl_fn=mkl_impl_fn,
         )
 
-    def __call__(self, x, out=None, order="K"):
+    def __call__(self, x, /, *, out=None, order="K"):
         return super().__call__(x, out=out, order=order)
 
 
@@ -837,7 +841,7 @@ def __init__(
             docs,
         )
 
-    def __call__(self, x, out=None, order="K"):
+    def __call__(self, x, /, *, out=None, order="K"):
         return super().__call__(x, out=out, order=order)
 
 
@@ -858,7 +862,7 @@ def __init__(
             docs,
         )
 
-    def __call__(self, x, out=None, order="K"):
+    def __call__(self, x, /, *, out=None, order="K"):
         if numpy.iscomplexobj(x):
             return super().__call__(x, out=out, order=order)
         return x
@@ -885,7 +889,7 @@ def __init__(
             mkl_impl_fn=mkl_impl_fn,
         )
 
-    def __call__(self, x, decimals=0, out=None, dtype=None):
+    def __call__(self, x, /, decimals=0, out=None, *, dtype=None):
         if decimals != 0:
             x_usm = dpnp.get_usm_ndarray(x)
             out_usm = None if out is None else dpnp.get_usm_ndarray(out)
@@ -928,7 +932,7 @@ def __init__(
             docs,
         )
 
-    def __call__(self, x, out=None, order="K"):
+    def __call__(self, x, /, *, out=None, order="K"):
         return super().__call__(x, out=out, order=order)