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Args: root (str or ``pathlib.Path``): Root directory of the VOC Dataset. year (string, optional): The dataset year, supports years ``"2007"`` to ``"2012"``. image_set (string, optional): Select the image_set to use, ``"train"``, ``"trainval"`` or ``"val"``. If ``year=="2007"``, can also be ``"test"``. download (bool, optional): If true, downloads the dataset from the internet and puts it in root directory. If dataset is already downloaded, it is not downloaded again. transform (callable, optional): A function/transform that takes in a PIL image and returns a transformed version. E.g, ``transforms.RandomCrop`` target_transform (callable, optional): A function/transform that takes in the target and transforms it. transforms (callable, optional): A function/transform that takes input sample and its target as entry and returns a transformed version. 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(default: alphabetic indexing of VOC's 20 classes). transform (callable, optional): A function/transform that takes in a PIL image and returns a transformed version. E.g, ``transforms.RandomCrop`` target_transform (callable, required): A function/transform that takes in the target and transforms it. transforms (callable, optional): A function/transform that takes input sample and its target as entry and returns a transformed version. 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