mmpretrain/tests/test_heads.py

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import torch
from mmcls.models.heads import MultiLabelClsHead, MultiLabelLinearClsHead
def test_multilabel_head():
head = MultiLabelClsHead()
fake_cls_score = torch.rand(4, 3)
fake_gt_label = torch.randint(0, 2, (4, 3))
losses = head.loss(fake_cls_score, fake_gt_label)
assert losses['loss'].item() > 0
def test_multilabel_linear_head():
head = MultiLabelLinearClsHead(3, 5)
fake_cls_score = torch.rand(4, 3)
fake_gt_label = torch.randint(0, 2, (4, 3))
head.init_weights()
losses = head.loss(fake_cls_score, fake_gt_label)
assert losses['loss'].item() > 0