From a9385af68e1217a93cb6d025862ff74758bd1468 Mon Sep 17 00:00:00 2001
From: Oleksandr Pavlyk <21087696+oleksandr-pavlyk@users.noreply.github.com>
Date: Tue, 14 Jan 2025 08:25:25 -0600
Subject: [PATCH] Make copy argument of __array__ method keyword-only

---
 dpctl/tensor/_usmarray.pyx | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/dpctl/tensor/_usmarray.pyx b/dpctl/tensor/_usmarray.pyx
index 150f0b3b65..668e17bd79 100644
--- a/dpctl/tensor/_usmarray.pyx
+++ b/dpctl/tensor/_usmarray.pyx
@@ -1552,8 +1552,15 @@ cdef class usm_ndarray:
     def __repr__(self):
         return usm_ndarray_repr(self)
 
-    def __array__(self, dtype=None, copy=None):
-        "NumPy array protocol"
+    def __array__(self, dtype=None, /, *, copy=None):
+        """NumPy's array protocol method to disallow implicit conversion.
+
+	Without this definition, `numpy.asarray(usm_ar)` converts
+	usm_ndarray instance into NumPy array with data type `object`
+	and every element being 0d usm_ndarray.
+
+        https://github.com/IntelPython/dpctl/pull/1384#issuecomment-1707212972
+	"""
         raise TypeError(
             "Implicit conversion to a NumPy array is not allowed. "
 	    "Use `dpctl.tensor.asnumpy` to copy data from this "