sxjscience 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_r334725782
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File path: python/mxnet/gluon/block.py
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@@ -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:
@leezu I think using the first or last non-None argument does not matter
much here. Our goal is to make sure that we will finally pick a meaningful
context for the parameters. In fact, the previous implementation has not
checked whether the contexts of the arguments are valid.
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