Python torch.range方法代碼示例

# 需要導入模塊: import torch [as 別名]
# 或者: from torch import range [as 別名]
def dynamic_evaluate(model, test_loader, val_loader, args):
    tester = Tester(model, args)
    if os.path.exists(os.path.join(args.save, 'logits_single.pth')): 
        val_pred, val_target, test_pred, test_target = \
            torch.load(os.path.join(args.save, 'logits_single.pth')) 
    else: 
        val_pred, val_target = tester.calc_logit(val_loader) 
        test_pred, test_target = tester.calc_logit(test_loader) 
        torch.save((val_pred, val_target, test_pred, test_target), 
                    os.path.join(args.save, 'logits_single.pth'))

    flops = torch.load(os.path.join(args.save, 'flops.pth'))

    with open(os.path.join(args.save, 'dynamic.txt'), 'w') as fout:
        for p in range(1, 40):
            print("*********************")
            _p = torch.FloatTensor(1).fill_(p * 1.0 / 20)
            probs = torch.exp(torch.log(_p) * torch.range(1, args.nBlocks))
            probs /= probs.sum()
            acc_val, _, T = tester.dynamic_eval_find_threshold(
                val_pred, val_target, probs, flops)
            acc_test, exp_flops = tester.dynamic_eval_with_threshold(
                test_pred, test_target, flops, T)
            print('valid acc: {:.3f}, test acc: {:.3f}, test flops: {:.2f}M'.format(acc_val, acc_test, exp_flops / 1e6))
            fout.write('{}\t{}\n'.format(acc_test, exp_flops.item())) 

# 需要導入模塊: import torch [as 別名]
# 或者: from torch import range [as 別名]
def dynamic_eval_with_threshold(self, logits, targets, flops, T):
        n_stage, n_sample, _ = logits.size()
        max_preds, argmax_preds = logits.max(dim=2, keepdim=False) # take the max logits as confidence

        acc_rec, exp = torch.zeros(n_stage), torch.zeros(n_stage)
        acc, expected_flops = 0, 0
        for i in range(n_sample):
            gold_label = targets[i]
            for k in range(n_stage):
                if max_preds[k][i].item() >= T[k]: # force to exit at k
                    _g = int(gold_label.item())
                    _pred = int(argmax_preds[k][i].item())
                    if _g == _pred:
                        acc += 1
                        acc_rec[k] += 1
                    exp[k] += 1
                    break
        acc_all, sample_all = 0, 0
        for k in range(n_stage):
            _t = exp[k] * 1.0 / n_sample
            sample_all += exp[k]
            expected_flops += _t * flops[k]
            acc_all += acc_rec[k]

        return acc * 100.0 / n_sample, expected_flops 

# 需要導入模塊: import torch [as 別名]
# 或者: from torch import range [as 別名]
def testClassErrorMeter(self):
        mtr = meter.ClassErrorMeter(topk=[1])
        output = torch.eye(3)
        if hasattr(torch, "arange"):
            target = torch.arange(0, 3)
        else:
            target = torch.range(0, 2)
        mtr.add(output, target)
        err = mtr.value()

        self.assertEqual(err, [0], "All should be correct")

        target[0] = 1
        target[1] = 0
        target[2] = 0
        mtr.add(output, target)
        err = mtr.value()
        self.assertEqual(err, [50.0], "Half should be correct") 

# 需要導入模塊: import torch [as 別名]
# 或者: from torch import range [as 別名]
def ScoreRANSAC(match1, match2, matchSetT, sampleIndex, score, tolerance, nbSamplePoint, paramEstimate) : 
	
	#All The Data
	nbMatch = len(matchSetT)
	sampleIndex = np.array(matchSetT)[sampleIndex]
	X = match1[sampleIndex]
	Y = match2[sampleIndex]
	H21 = paramEstimate(X, Y)
	
	error = Prediction(match1, match2, H21)
	
	isInlier = error < tolerance
	inlier = {}
	
	for i in range(len(match1)) : 
		if isInlier[i] : 
			score_i = score[i] * np.exp(-1 * error[i] ** 2 / tolerance ** 2)
			#score_i = score[i]
			key = (match1[i][0], match1[i][1])
			if inlier.has_key(key) and inlier[key][1] < score_i : 
				inlier[key] = [match2[i], score_i] 
			elif not inlier.has_key(key) : 
				inlier[key] = [match2[i], score_i]
			
	return H21, sum([item[1] for item in inlier.values()]), matchSetT 

# 需要導入模塊: import torch [as 別名]
# 或者: from torch import range [as 別名]
def GetCC(match1, match2, mask1, mask2, score) : 
	match1_arr = np.array(match1).astype(int)
	mask1[match1_arr[:, 0].flatten(), match1_arr[:, 1].flatten()] = 1
	label1, nb_label1 = measure.label(mask1, connectivity=2, return_num=True)
	dict_match = dict(zip(match1, match2))
	dict_score = dict(zip(match1, score))
	
	CC = []
	CC_score = np.zeros(nb_label1)
	for i in range(1, nb_label1 + 1) : 
		CC.append({})
		posx, posy = np.where(label1 == i)
		tmp_match1 = [(posx[j], posy[j]) for j in range(len(posx))]
		tmp_match2 = [dict_match[item] for item in tmp_match1]
		CC[i-1] = dict(zip(tmp_match1, tmp_match2))
		CC[i-1]['mask2shape'] = mask2.shape
		CC_score[i -1 ] = sum(dict_score[item] for item in tmp_match1)
	return CC, CC_score 

# 需要導入模塊: import torch [as 別名]
# 或者: from torch import range [as 別名]
def get_points(self, featmap_sizes, dtype, device):
        """Get points according to feature map sizes.

        Args:
            featmap_sizes (list[tuple]): Multi-level feature map sizes.
            dtype (torch.dtype): Type of points.
            device (torch.device): Device of points.

        Returns:
            tuple: points of each image.
        """
        mlvl_points = []
        for i in range(len(featmap_sizes)):
            mlvl_points.append(
                self.get_points_single(featmap_sizes[i], self.strides[i],
                                       dtype, device))
        return mlvl_points 

# 需要導入模塊: import torch [as 別名]
# 或者: from torch import range [as 別名]
def test_forward_backward(self):
        import torch
        import torch.nn.functional as F
        from torch.autograd import Variable
        from reid.loss import OIMLoss
        criterion = OIMLoss(3, 3, scalar=1.0, size_average=False)
        criterion.lut = torch.eye(3)
        x = Variable(torch.randn(3, 3), requires_grad=True)
        y = Variable(torch.range(0, 2).long())
        loss = criterion(x, y)
        loss.backward()
        probs = F.softmax(x)
        grads = probs.data - torch.eye(3)
        abs_diff = torch.abs(grads - x.grad.data)
        self.assertEquals(torch.log(probs).diag().sum(), -loss)
        self.assertTrue(torch.max(abs_diff) < 1e-6) 

# 需要導入模塊: import torch [as 別名]
# 或者: from torch import range [as 別名]
def __init__(self, num_features, num_classes, hidden_size, num_layers, dropout, sample_size):
        super(ASGCN, self).__init__()

        self.num_features = num_features
        self.num_classes = num_classes
        self.hidden_size = hidden_size
        self.num_layers = num_layers
        self.dropout = dropout
        self.sample_size = sample_size

        self.w_s0 = Parameter(torch.FloatTensor(num_features))
        self.w_s1 = Parameter(torch.FloatTensor(num_features))

        shapes = [num_features] + [hidden_size] * (num_layers - 1) + [num_classes]
        self.convs = nn.ModuleList(
            [
                GraphConvolution(shapes[layer], shapes[layer + 1])
                for layer in range(num_layers)
            ]
        )

        self.reset_parameters() 

# 需要導入模塊: import torch [as 別名]
# 或者: from torch import range [as 別名]
def add_conj(fact):
    l1 = fact[3].size()[0]
    l2 = fact[3].size()[1]
    index1_ = torch.cat((fact[2], torch.range(0, l1 - 1).long()), 0)
    index2_ = torch.cat((fact[1], torch.zeros(l1).long() + l1), 0)
    mat_ = torch.Tensor(l1, l1 + l2)
    a = 1 / (fact[3] + 1e-10) + 1
    mat_[:, l2:] = (1 / a.min(1)[0].resize_(l1)).diag()
    mat_[:, :l2] = 1 / a - 1e-10
    return [fact[0], index1_, index2_, mat_] 

# 需要導入模塊: import torch [as 別名]
# 或者: from torch import range [as 別名]
def forward_step(net, mid_net, loss_fn, loader, args):
    pair_total = 0
    catfeat = []
    for i in range(args.loss_step):
        catfeat.append([])
    label = []
    epoch_end = False
    while pair_total < args.max_pair / args.worker:
        pair_total, epoch_end = embed_step(pair_total, net, mid_net, loss_fn, catfeat,
                                           label, loader, args, volatile=args.fix_net)
    losses = []
    for k in range(len(catfeat)):
        if args.fix_net:
            for feat in catfeat[k]:
                if isinstance(feat, tuple):
                    feat[0].volatile = False
                    feat[0].requires_grad = False
                    feat[1].volatile = False
                    feat[1].requires_grad = False
                else:
                    feat.volatile = False
                    feat.requires_grad = False
        losses.append(loss_fn[k](catfeat[k], label))
    loss = sum(losses)
    loss_total = loss.data[0]
    correct = []
    for k in range(len(loss_fn)):
        correct.append(loss_fn[k].check_result(label))
    total = len(label)
    net.zero_grad()
    if mid_net != None:
        mid_net.zero_grad()
    for l in loss_fn:
        l.zero_grad()
    loss.backward()
    return loss_total, correct, total, epoch_end 

# 需要導入模塊: import torch [as 別名]
# 或者: from torch import range [as 別名]
def __getitem__(self, index):
        assert index <= len(self), 'index range error'
        index += 1
        with self.env.begin(write=False) as txn:
            img_key = b'image-%09d' % index
            imgbuf = txn.get(img_key)

            buf = six.BytesIO()
            buf.write(imgbuf)
            buf.seek(0)
            try:
                img = Image.open(buf).convert('L')
            except IOError:
                print('Corrupted image for %d' % index)
                return self[index + 1]

            if self.transform is not None:
                img = self.transform(img)

            label_key = b'label-%09d' % index
            label = str(txn.get(label_key))

            if self.target_transform is not None:
                label = self.target_transform(label)

        return (img, label.split('\'')[1]) 

# 需要導入模塊: import torch [as 別名]
# 或者: from torch import range [as 別名]
def __iter__(self):
        n_batch = len(self) // self.batch_size
        tail = len(self) % self.batch_size
        index = torch.LongTensor(len(self)).fill_(0)
        for i in range(n_batch):
            random_start = random.randint(0, len(self) - self.batch_size)
            batch_index = random_start + torch.range(0, self.batch_size - 1)
            index[i * self.batch_size:(i + 1) * self.batch_size] = batch_index
        # deal with tail
        if tail:
            random_start = random.randint(0, len(self) - self.batch_size)
            tail_index = random_start + torch.range(0, tail - 1)
            index[(i + 1) * self.batch_size:] = tail_index

        return iter(index) 

# 需要導入模塊: import torch [as 別名]
# 或者: from torch import range [as 別名]
def calc_logit(self, dataloader):
        self.model.eval()
        n_stage = self.args.nBlocks
        logits = [[] for _ in range(n_stage)]
        targets = []
        for i, (input, target) in enumerate(dataloader):
            targets.append(target)
            with torch.no_grad():
                input_var = torch.autograd.Variable(input)
                output = self.model(input_var)
                if not isinstance(output, list):
                    output = [output]
                for b in range(n_stage):
                    _t = self.softmax(output[b])

                    logits[b].append(_t) 

            if i % self.args.print_freq == 0: 
                print('Generate Logit: [{0}/{1}]'.format(i, len(dataloader)))

        for b in range(n_stage):
            logits[b] = torch.cat(logits[b], dim=0)

        size = (n_stage, logits[0].size(0), logits[0].size(1))
        ts_logits = torch.Tensor().resize_(size).zero_()
        for b in range(n_stage):
            ts_logits[b].copy_(logits[b])

        targets = torch.cat(targets, dim=0)
        ts_targets = torch.Tensor().resize_(size[1]).copy_(targets)

        return ts_logits, ts_targets 

# 需要導入模塊: import torch [as 別名]
# 或者: from torch import range [as 別名]
def sequence_mask(sequence_length, max_len=None):
	if max_len is None:
		max_len = sequence_length.data.max()
	batch_size = sequence_length.size(0)
#	seq_range = torch.range(0, max_len - 1).long()
	seq_range = torch.arange(0, max_len).long() # andy
	seq_range_expand = seq_range.unsqueeze(0).expand(batch_size, max_len)
	seq_range_expand = Variable(seq_range_expand)
	if sequence_length.is_cuda:
		seq_range_expand = seq_range_expand.cuda()
	seq_length_expand = (sequence_length.unsqueeze(1)
						 .expand_as(seq_range_expand))
	return seq_range_expand < seq_length_expand 

# 需要導入模塊: import torch [as 別名]
# 或者: from torch import range [as 別名]
def pesudo_nms_poly(dets, iou_thr):
    keep = torch.range(0, len(dets))
    return dets, keep