Nyströmer implemented but not tested

1 files changed, 14 insertions, 3 deletions

diff --git a/text_recognizer/networks/transformer/norm.py b/text_recognizer/networks/transformer/norm.py
index 9160876..58c8770 100644
--- a/text_recognizer/networks/transformer/norm.py
+++ b/text_recognizer/networks/transformer/norm.py
@@ -4,7 +4,7 @@ Copied from lucidrains:
     https://github.com/lucidrains/x-transformers/blob/main/x_transformers/x_transformers.py
 
 """
-from typing import Callable, Dict
+from typing import Callable, Dict, Type
 
 import torch
 from torch import nn
@@ -31,5 +31,16 @@ class ScaleNorm(nn.Module):
 
     def forward(self, x: Tensor) -> Tensor:
         norm = torch.norm(x, dim=-1, keepdim=True) * self.scale
-        return x / norm.clamp(min=self.eps) self.g
-    
+        return x / norm.clamp(min=self.eps) * self.g
+
+
+class PreNorm(nn.Module):
+    def __init__(self, dim: int, fn: Type[nn.Module]) -> None:
+        super().__init__()
+        self.norm = nn.LayerNorm(dim)
+        self.fn = fn
+
+    def forward(self, x: Tensor, **kwargs: Dict) -> Tensor:
+        """Norm tensor."""
+        x = self.norm(x)
+        return self.fn(x, **kwargs)