add flat (#84)

Author: Rubtsowa

dpnp/dparray.pyx

@@ -393,6 +393,11 @@ cdef class dparray:
     # -------------------------------------------------------------------------
     # Shape manipulation
     # -------------------------------------------------------------------------
+
+    @property
+    def flat(self):
+        return self
+
     def flatten(self, order='C'):
         """
         Return a copy of the array collapsed into one dimension.

tests/test_flat.py

@@ -0,0 +1,41 @@
+import pytest
+
+import dpnp as inp
+
+import numpy
+
+
+@pytest.mark.parametrize("type",
+                         [numpy.int64],
+                         ids=['int64'])
+def test_flat(type):
+    a = numpy.array([1, 0, 2, -3, -1, 2, 21, -9])
+    ia = inp.array(a)
+
+    result = ia.flat[0]
+    expected = a.flat[0]
+    numpy.testing.assert_array_equal(expected, result)
+
+
+@pytest.mark.parametrize("type",
+                         [numpy.int64],
+                         ids=['int64'])
+def test_flat2(type):
+    a = numpy.arange(1, 7).reshape(2, 3)
+    ia = inp.array(a)
+
+    result = ia.flat[3]
+    expected = a.flat[3]
+    numpy.testing.assert_array_equal(expected, result)
+
+
+@pytest.mark.parametrize("type",
+                         [numpy.int64],
+                         ids=['int64'])
+def test_flat3(type):
+    a = numpy.arange(1, 7).reshape(2, 3).T
+    ia = inp.array(a)
+
+    result = ia.flat[3]
+    expected = a.flat[3]
+    numpy.testing.assert_array_equal(expected, result)