[GitHub] Paul0M commented on issue #11561: AttributeError: type object 'SymbolBlock' has no attribute 'imports'

[GitBox <gi...@apache.org>]

Paul0M commented on issue #11561:  AttributeError: type object 'SymbolBlock' has no attribute 'imports'
URL: https://github.com/apache/incubator-mxnet/issues/11561#issuecomment-403682437
 
 
   
   In mxnet/gluon/block.py, there is **imports** code as follows:
   But in the server (pip install mxnet-cu90), there isnot.
   So I've added these code, then every's Fine.
   
   Also I noticed that this applies to mxnet-cu91.
   
   ```python
       @staticmethod
       def imports(symbol_file, input_names, param_file=None, ctx=None):
           """Import model previously saved by `HybridBlock.export` or
           `Module.save_checkpoint` as a SymbolBlock for use in Gluon.
           Parameters
           ----------
           symbol_file : str
               Path to symbol file.
           input_names : list of str
               List of input variable names
           param_file : str, optional
               Path to parameter file.
           ctx : Context, default None
               The context to initialize SymbolBlock on.
           Returns
           -------
           SymbolBlock
               SymbolBlock loaded from symbol and parameter files.
           Examples
           --------
           >>> net1 = gluon.model_zoo.vision.resnet18_v1(
           ...     prefix='resnet', pretrained=True)
           >>> net1.hybridize()
           >>> x = mx.nd.random.normal(shape=(1, 3, 32, 32))
           >>> out1 = net1(x)
           >>> net1.export('net1', epoch=1)
           >>>
           >>> net2 = gluon.SymbolBlock.imports(
           ...     'net1-symbol.json', ['data'], 'net1-0001.params')
           >>> out2 = net2(x)
           """
           sym = symbol.load(symbol_file)
           if isinstance(input_names, str):
               input_names = [input_names]
           inputs = [symbol.var(i) for i in input_names]
           ret = SymbolBlock(sym, inputs)
           if param_file is not None:
               ret.collect_params().load(param_file, ctx=ctx)
           return ret
   
   ```

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