DSSM tutorial code: RuntimeError Expected object of scalar type Float but got scalar type Double

[katestfla]

Describe the bug

When I run the tutorial code for DSSM, the following error appears:
RuntimeError: Expected object of scalar type Float but got scalar type Double for argument #2 'mat1' in call to _th_addmm

please find the details below:

---

RuntimeError Traceback (most recent call last)
in
----> 1 trainer.run()

~/opt/anaconda3/lib/python3.7/site-packages/matchzoo_py-1.1.1-py3.7.egg/matchzoo/trainers/trainer.py in run(self)
225 for epoch in range(self._start_epoch, self._epochs + 1):
226 self._epoch = epoch
--> 227 self._run_epoch()
228 self._run_scheduler()
229 if self._early_stopping.should_stop_early:

~/opt/anaconda3/lib/python3.7/site-packages/matchzoo_py-1.1.1-py3.7.egg/matchzoo/trainers/trainer.py in _run_epoch(self)
250 disable=not self._verbose) as pbar:
251 for step, (inputs, target) in pbar:
--> 252 outputs = self._model(inputs)
253 # Caculate all losses and sum them up
254 loss = torch.sum(

~/opt/anaconda3/lib/python3.7/site-packages/torch/nn/modules/module.py in _call_impl(self, *input, **kwargs)
720 result = self._slow_forward(*input, **kwargs)
721 else:
--> 722 result = self.forward(*input, **kwargs)
723 for hook in itertools.chain(
724 _global_forward_hooks.values(),

~/opt/anaconda3/lib/python3.7/site-packages/matchzoo_py-1.1.1-py3.7.egg/matchzoo/models/dssm.py in forward(self, inputs)
89
90 # print (inputs['ngram_left'])
---> 91 # print (inputs['ngram_right'])
92 # Process left & right input.
93 input_left, input_right = inputs['ngram_left'], inputs['ngram_right'].float()

~/opt/anaconda3/lib/python3.7/site-packages/torch/nn/modules/module.py in _call_impl(self, *input, **kwargs)
720 result = self._slow_forward(*input, **kwargs)
721 else:
--> 722 result = self.forward(*input, **kwargs)
723 for hook in itertools.chain(
724 _global_forward_hooks.values(),

~/opt/anaconda3/lib/python3.7/site-packages/torch/nn/modules/container.py in forward(self, input)
115 def forward(self, input):
116 for module in self:
--> 117 input = module(input)
118 return input
119

~/opt/anaconda3/lib/python3.7/site-packages/torch/nn/modules/module.py in _call_impl(self, *input, **kwargs)
720 result = self._slow_forward(*input, **kwargs)
721 else:
--> 722 result = self.forward(*input, **kwargs)
723 for hook in itertools.chain(
724 _global_forward_hooks.values(),

~/opt/anaconda3/lib/python3.7/site-packages/torch/nn/modules/container.py in forward(self, input)
115 def forward(self, input):
116 for module in self:
--> 117 input = module(input)
118 return input
119

~/opt/anaconda3/lib/python3.7/site-packages/torch/nn/modules/module.py in _call_impl(self, *input, **kwargs)
720 result = self._slow_forward(*input, **kwargs)
721 else:
--> 722 result = self.forward(*input, **kwargs)
723 for hook in itertools.chain(
724 _global_forward_hooks.values(),

~/opt/anaconda3/lib/python3.7/site-packages/torch/nn/modules/linear.py in forward(self, input)
89
90 def forward(self, input: Tensor) -> Tensor:
---> 91 return F.linear(input, self.weight, self.bias)
92
93 def extra_repr(self) -> str:

~/opt/anaconda3/lib/python3.7/site-packages/torch/nn/functional.py in linear(input, weight, bias)
1672 if input.dim() == 2 and bias is not None:
1673 # fused op is marginally faster
-> 1674 ret = torch.addmm(bias, input, weight.t())
1675 else:
1676 output = input.matmul(weight.t())

RuntimeError: Expected object of scalar type Float but got scalar type Double for argument #2 'mat1' in call to _th_addmm

Describe your attempts

I am trying to address this problem according to the following post:
https://stackoverflow.com/questions/56741087/how-to-fix-runtimeerror-expected-object-of-scalar-type-float-but-got-scalar-typ/56741419

But it seems not working by adding float().

Context

• OS: MAC OS 10.15.6
• Hardware: CPU only
• MatchZoo-py version: 1.1.1

[faneshion]

@Chriskuei can you help @katestfla to address this issue?

[Chriskuei]

Hi @katestfla, which version of PyTorch do you install?