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import os |
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from flash.image import ImageClassifier |
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from flash.core.data.data_source import LabelsState |
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class PreTrainedPipeline(): |
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def __init__(self, path=""): |
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self.device = 'cpu' |
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self.model = ImageClassifier.load_from_checkpoint(os.path.join(path, "pytorch_model.bin")) |
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self.data_pipeline = self.model.build_data_pipeline() |
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self.labels = self.model._data_pipeline_state._state[LabelsState].labels |
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self.top_k = 5 |
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def __call__(self, inputs): |
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x = self.data_pipeline.worker_preprocessor('predict')({'input': inputs}) |
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x = self.model.transfer_batch_to_device(x, self.device, 0) |
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x = self.data_pipeline.device_preprocessor('predict')(x) |
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out = self.model.predict_step(x, 0) |
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proba = out['preds'].softmax(1)[0].tolist() |
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return [{'score': s, 'label': l} for s, l in sorted(zip(proba, self.labels), reverse=True)[:self.top_k]] |
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