Delete dataset.py
Browse files- dataset.py +0 -80
dataset.py
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from torchvision.datasets import MNIST
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import os
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import numpy as np
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import random
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train_dataset = MNIST(os.path.join('./', "MNIST"), train=True, download=True)
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test_dataset = MNIST(os.path.join('./', "MNIST"), train=False, download=True)
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class MNIST_DS(object):
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def __init__(self, train_dataset, test_dataset):
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self.__train_labels_idx_map = {}
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self.__test_labels_idx_map = {}
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self.__train_data = train_dataset.data
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self.__test_data = test_dataset.data
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self.__train_labels = train_dataset.targets
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self.__test_labels = test_dataset.targets
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self.__train_labels_np = self.__train_labels.numpy()
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self.__train_unique_labels = np.unique(self.__train_labels_np)
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self.__test_labels_np = self.__test_labels.numpy()
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self.__test_unique_labels = np.unique(self.__test_labels_np)
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def load(self):
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self.__train_labels_idx_map = {}
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for label in self.__train_unique_labels:
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self.__train_labels_idx_map[label] = np.where(self.__train_labels_np == label)[0]
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self.__test_labels_idx_map = {}
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for label in self.__test_unique_labels:
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self.__test_labels_idx_map[label] = np.where(self.__test_labels_np == label)[0]
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def getTriplet(self, split="train"):
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pos_label = 0
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neg_label = 0
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label_idx_map = None
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data = None
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if split == 'train':
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pos_label = self.__train_unique_labels[random.randint(0, len(self.__train_unique_labels) - 1)]
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neg_label = pos_label
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while neg_label is pos_label:
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neg_label = self.__train_unique_labels[random.randint(0, len(self.__train_unique_labels) - 1)]
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label_idx_map = self.__train_labels_idx_map
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data = self.__train_data
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else:
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pos_label = self.__test_unique_labels[random.randint(0, len(self.__test_unique_labels) - 1)]
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neg_label = pos_label
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while neg_label is pos_label:
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neg_label = self.__test_unique_labels[random.randint(0, len(self.__test_unique_labels) - 1)]
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label_idx_map = self.__test_labels_idx_map
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data = self.__test_data
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pos_label_idx_map = label_idx_map[pos_label]
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pos_img_anchor_idx = pos_label_idx_map[random.randint(0, len(pos_label_idx_map) - 1)]
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pos_img_idx = pos_img_anchor_idx
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while pos_img_idx is pos_img_anchor_idx:
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pos_img_idx = pos_label_idx_map[random.randint(0, len(pos_label_idx_map) - 1)]
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neg_label_idx_map = label_idx_map[neg_label]
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neg_img_idx = neg_label_idx_map[random.randint(0, len(neg_label_idx_map) - 1)]
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pos_anchor_img = data[pos_img_anchor_idx].numpy()
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pos_img = data[pos_img_idx].numpy()
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neg_img = data[neg_img_idx].numpy()
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return pos_anchor_img, pos_img, neg_img
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dset_obj = MNIST_DS(train_dataset, test_dataset)
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dset_obj.load()
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train_triplets = []
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pos_anchor_img, pos_img, neg_img = dset_obj.getTriplet()
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train_triplets.append([pos_anchor_img, pos_img, neg_img])
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print(train_triplets[0][0])
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