I’m using `relay.frontend.from_pytorch` to convert pytorch model, but raise 
error like this:

    Traceback (most recent call last):
      File "tune_network_cuda_test.py", line 200, in <module>
        mod, params, input_shape, output_shape = get_local_network("pt", 
network, batch_size, shape, layout)
      File "tune_network_cuda_test.py", line 97, in get_local_network
        mod, params = relay.frontend.from_pytorch(torch_model, shape_info)
      File "/wen/yincw/open_source/tvm/python/tvm/relay/frontend/pytorch.py", 
line 3285, in from_pytorch
        converter.report_missing_conversion(op_names)
      File "/wen/yincw/open_source/tvm/python/tvm/relay/frontend/pytorch.py", 
line 2545, in report_missing_conversion
        raise NotImplementedError(msg)
    NotImplementedError: The following operators are not implemented: 
['aten::im2col']

and another similar error:

    Traceback (most recent call last):
      File "tune_network_cuda_test.py", line 209, in <module>
        mod, params, input_shape, output_shape = get_local_network("pt", 
network, batch_size, shape, layout)
      File "tune_network_cuda_test.py", line 106, in get_local_network
        mod, params = relay.frontend.from_pytorch(torch_model, shape_info)
      File "/wen/yincw/open_source/tvm/python/tvm/relay/frontend/pytorch.py", 
line 3285, in from_pytorch
        converter.report_missing_conversion(op_names)
      File "/wen/yincw/open_source/tvm/python/tvm/relay/frontend/pytorch.py", 
line 2545, in report_missing_conversion
        raise NotImplementedError(msg)
    NotImplementedError: The following operators are not implemented: 
['aten::grid_sampler']

pytorch=1.3 tvm=0.8 dev0

Could anyone help?





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