diagonal array method (#1019)

Author: Alexander-Makaryev

dpnp/dpnp_array.py

@@ -408,7 +408,19 @@ def conjugate(self):
  # 'cumprod',
  # 'cumsum',
  # 'data',
- # 'diagonal',
+
+    def diagonal(input, offset=0, axis1=0, axis2=1):
+        """
+        Return specified diagonals.
+
+        See Also
+        --------
+        :obj:`dpnp.diagonal`
+
+        """
+
+        return dpnp.diagonal(input, offset, axis1, axis2)
+
  # 'dot',
 
     @property

tests/skipped_tests_gpu.tbl

@@ -288,8 +288,6 @@ tests/third_party/cupy/core_tests/test_ndarray_copy_and_view.py::TestArrayCopyAn
 tests/third_party/cupy/core_tests/test_ndarray_copy_and_view.py::TestArrayCopyAndView::test_astype_strides_swapped
 tests/third_party/cupy/core_tests/test_ndarray_copy_and_view.py::TestArrayCopyAndView::test_astype_type_c_contiguous_no_copy
 tests/third_party/cupy/core_tests/test_ndarray_copy_and_view.py::TestArrayCopyAndView::test_astype_type_f_contiguous_no_copy
-tests/third_party/cupy/core_tests/test_ndarray_copy_and_view.py::TestArrayCopyAndView::test_diagonal1
-tests/third_party/cupy/core_tests/test_ndarray_copy_and_view.py::TestArrayCopyAndView::test_diagonal2
 tests/third_party/cupy/core_tests/test_ndarray_copy_and_view.py::TestArrayCopyAndView::test_transposed_fill
 tests/third_party/cupy/core_tests/test_ndarray_copy_and_view.py::TestArrayCopyAndView::test_transposed_flatten
 tests/third_party/cupy/core_tests/test_ndarray_copy_and_view.py::TestArrayCopyAndView::test_flatten_copied