remove float(-inf) as masking value

setup.py

@@ -3,7 +3,7 @@ from setuptools import setup, find_packages
 setup(
   name = 'vit-pytorch',
   packages = find_packages(exclude=['examples']),
-  version = '0.2.6',
+  version = '0.2.7',
   license='MIT',
   description = 'Vision Transformer (ViT) - Pytorch',
   author = 'Phil Wang',

vit_pytorch/vit_pytorch.py

@@ -51,12 +51,13 @@ class Attention(nn.Module):
         q, k, v = map(lambda t: rearrange(t, 'b n (h d) -> b h n d', h = h), qkv)
 
         dots = torch.einsum('bhid,bhjd->bhij', q, k) * self.scale
+        mask_value = -torch.finfo(dots.dtype).max
 
         if mask is not None:
             mask = F.pad(mask.flatten(1), (1, 0), value = True)
             assert mask.shape[-1] == dots.shape[-1], 'mask has incorrect dimensions'
             mask = mask[:, None, :] * mask[:, :, None]
-            dots.masked_fill_(~mask, float('-inf'))
+            dots.masked_fill_(~mask, mask_value)
             del mask
 
         attn = dots.softmax(dim=-1)