[GitHub] [incubator-mxnet] leezu commented on a change in pull request #16465: [Gluon] [Fix] [WIP] Fix HybridBlock when hybridize is not called

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leezu commented on a change in pull request #16465: [Gluon] [Fix] [WIP] Fix HybridBlock when hybridize is not called
URL: https://github.com/apache/incubator-mxnet/pull/16465#discussion_r334611424
 
 

 ##########
 File path: python/mxnet/gluon/block.py
 ##########
 @@ -1054,34 +1098,16 @@ def register_op_hook(self, callback, monitor_all=False):
     def forward(self, x, *args):
         """Defines the forward computation. Arguments can be either
         :py:class:`NDArray` or :py:class:`Symbol`."""
-        flatten_args = _flatten([x] + list(args), 'inputs')[0]
-        is_ndarray = None
-        ctx = None
-        exist_sym_nd = False
-        for ele in flatten_args:
-            if isinstance(ele, NDArray):
-                if is_ndarray is False:
-                    raise ValueError('In HybridBlock, we do not support mixed NDArrays and Symbols'
-                                     ' types for the input.\n'
-                                     'Received types are: {}.'
-                                     .format([type(ele) for ele in flatten_args]))
-                is_ndarray = True
-                exist_sym_nd = True
-                ctx = ele.context
 
 Review comment:
   This line introduced in #16280 is not compatible with the previous context handling. Previously, always `x.context` is used as default context. https://github.com/apache/incubator-mxnet/pull/16280/files#diff-29da832c2145752f3906a2f71c7b63baL982
   Does it matter?

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