yeandy commented on code in PR #17196: URL: https://github.com/apache/beam/pull/17196#discussion_r845149912
########## sdks/python/apache_beam/ml/inference/pytorch_impl.py: ########## @@ -0,0 +1,119 @@ +# +# Licensed to the Apache Software Foundation (ASF) under one or more +# contributor license agreements. See the NOTICE file distributed with +# this work for additional information regarding copyright ownership. +# The ASF licenses this file to You under the Apache License, Version 2.0 +# (the "License"); you may not use this file except in compliance with +# the License. You may obtain a copy of the License at +# +# http://www.apache.org/licenses/LICENSE-2.0 +# +# Unless required by applicable law or agreed to in writing, software +# distributed under the License is distributed on an "AS IS" BASIS, +# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +# See the License for the specific language governing permissions and +# limitations under the License. +# + +# pytype: skip-file + +from typing import Iterable +from typing import List +from typing import Union + +import numpy as np +import pickle +import torch +from torch import nn + +from apache_beam.ml.inference.base import InferenceRunner +from apache_beam.ml.inference.base import ModelLoader + + +class PytorchInferenceRunner(InferenceRunner): + """ + Implements Pytorch inference method + """ + def __init__(self, input_dim: int, device: torch.device): + self._input_dim = input_dim + self._device = device + + def run_inference( + self, batch: List[Union[np.ndarray, torch.Tensor]], + model: nn.Module) -> Iterable[torch.Tensor]: + """ + Runs inferences on a batch of examples and returns an Iterable of + Predictions.""" + if batch: + if isinstance(batch[0], np.ndarray): + batch = torch.Tensor(batch) + elif isinstance(batch[0], torch.Tensor): + batch = torch.stack(batch) + else: + raise ValueError("PCollection must be an numpy array or a torch Tensor") + + if batch.device != self._device: + batch = batch.to(self._device) + return model(batch) + + def get_num_bytes(self, batch: List[torch.Tensor]) -> int: + """Returns the number of bytes of data for a batch.""" + total_size = 0 + for el in batch: + if isinstance(el, np.ndarray): + total_size += el.itemsize + elif isinstance(el, torch.Tensor): + total_size += el.element_size() + else: + total_size += len(pickle.dumps(el)) + return total_size + + def get_metrics_namespace(self) -> str: + """ + Returns a namespace for metrics collected by the RunInference transform. + """ + return 'RunInferencePytorch' + + +class PytorchModelLoader(ModelLoader): + """Loads a Pytorch Model.""" + def __init__( + self, + input_dim: int, + state_dict_path: str, Review Comment: Yes. It is the path to the dictionary of internal model parameters/states. PyTorch docs calls it `state_dict` during load (i.e. `model.load_state_dict()`) so I borrowed the name. ########## sdks/python/apache_beam/ml/inference/pytorch_impl.py: ########## @@ -0,0 +1,119 @@ +# +# Licensed to the Apache Software Foundation (ASF) under one or more +# contributor license agreements. See the NOTICE file distributed with +# this work for additional information regarding copyright ownership. +# The ASF licenses this file to You under the Apache License, Version 2.0 +# (the "License"); you may not use this file except in compliance with +# the License. You may obtain a copy of the License at +# +# http://www.apache.org/licenses/LICENSE-2.0 +# +# Unless required by applicable law or agreed to in writing, software +# distributed under the License is distributed on an "AS IS" BASIS, +# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +# See the License for the specific language governing permissions and +# limitations under the License. +# + +# pytype: skip-file + +from typing import Iterable +from typing import List +from typing import Union + +import numpy as np +import pickle +import torch +from torch import nn + +from apache_beam.ml.inference.base import InferenceRunner +from apache_beam.ml.inference.base import ModelLoader + + +class PytorchInferenceRunner(InferenceRunner): + """ + Implements Pytorch inference method + """ + def __init__(self, input_dim: int, device: torch.device): Review Comment: Yes, it's `input_dimension`. But moot now since I've removed this arg. -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
