anirudh2290 commented on a change in pull request #9681: Better Exception 
Handling for Operators
URL: https://github.com/apache/incubator-mxnet/pull/9681#discussion_r165774874
 
 

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 File path: tests/python/unittest/test_exc_handling.py
 ##########
 @@ -0,0 +1,112 @@
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+#Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+
+import mxnet as mx
+import numpy as np
+from mxnet import gluon
+from mxnet.gluon import nn
+from mxnet.base import MXNetError
+from mxnet.test_utils import assert_exception, default_context, 
set_default_context
+from nose.tools import assert_raises
+
+def test_exc_imperative():
+    def imperative(exec_numpy=True):
+        a = mx.nd.random_normal(0, 1, (2, 2))
+        b = mx.nd.random_normal(0, -1, (2, 2))
+        c = mx.nd.dot(a, b)
+        if exec_numpy:
+            c.asnumpy()
+
+    imperative(exec_numpy=False)
+    assert_raises(MXNetError, imperative, True)
+
+def test_exc_symbolic():
+    def symbolic(exec_backward=True):
+        x = mx.sym.Variable('x')
+        y = mx.sym.Variable('y')
+        z = mx.sym.Variable('z')
+        x_shape = (2, 2)
+        z_shape = (3, 2)
+        inputs = [x, y]
+        out = mx.symbol.ElementWiseSum(*inputs, name="esum")
+        out = mx.sym.dot(z, out)
+        out2 = mx.sym.random_normal(0, -1, x_shape, ctx=default_context())
 
 Review comment:
   Fixed.

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