kevinthesun commented on a change in pull request #4312:
URL: https://github.com/apache/incubator-tvm/pull/4312#discussion_r434115162



##########
File path: python/tvm/relay/frontend/tensorflow.py
##########
@@ -614,6 +614,53 @@ def _impl(inputs, attr, params, mod):
         return out
     return _impl
 
+def _nms():
+    def _impl(inputs, attr, params, mod):
+        # Get parameter values
+        max_output_size = 
int(np.atleast_1d(inputs[2].data.asnumpy().astype("int64"))[0])

Review comment:
       Handle symbolic max_output_size:
   ```suggestion
           try:
               max_output_size = 
int(np.atleast_1d(inputs[2].data.asnumpy().astype("int64"))[0])
           except Exception:
               try:
                   max_output_size = _infer_value(inputs[2], params, 
mod).asnumpy().astype("int64").tolist()[0]
               except Exception:
                   max_output_size = -1
   ```




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