haojin2 commented on a change in pull request #15906: [Numpy] Numpy operator
diff
URL: https://github.com/apache/incubator-mxnet/pull/15906#discussion_r317878722
##########
File path: tests/python/unittest/test_numpy_op.py
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@@ -880,6 +880,69 @@ def get_new_shape(shape, axis):
assert_almost_equal(mx_out.asnumpy(), np_out, rtol=1e-3,
atol=1e-5)
+@with_seed()
+@use_np
+def test_np_diff():
+ def np_diff_backward(ograd, n, axis):
+ res = ograd
+ for i in range(n):
+ res = _np.negative(_np.diff(res, n=1, axis=axis, prepend=0,
append=0))
+ return res
+
+ @use_np
Review comment:
get rid of this line.
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