the dataclass init needs to use the default factory pattern, according to Ross

timm/models/vitamin.py

@@ -21,7 +21,7 @@ https://github.com/huggingface/pytorch-image-models/blob/main/timm/models/vision
 
 from functools import partial
 from typing import List, Tuple
-from dataclasses import dataclass, replace
+from dataclasses import dataclass, replace, field
 from typing import Callable, Optional, Union, Tuple, List, Sequence
 import math, time
 from torch.jit import Final
@@ -29,16 +29,17 @@ import torch
 import torch.nn as nn
 import torch.nn.functional as F
 import timm
-from timm.layers import to_2tuple
+
 from torch.utils.checkpoint import checkpoint
 from timm.models.layers import create_attn, get_norm_layer, get_norm_act_layer, create_conv2d, make_divisible, trunc_normal_tf_
 
-from timm.models._registry import register_model
+from timm.layers import to_2tuple
 from timm.layers import DropPath
 from timm.layers.norm_act import _create_act
 
 from timm.models._manipulate import named_apply, checkpoint_seq
 from timm.models._builder import build_model_with_cfg
+from timm.models._registry import register_model
 from timm.models.vision_transformer import VisionTransformer, checkpoint_filter_fn
 from timm.models.vision_transformer_hybrid import HybridEmbed
 
@@ -54,37 +55,19 @@ class VitConvCfg:
     pool_type: str = 'avg2'
     downsample_pool_type: str = 'avg2'
     act_layer: str = 'gelu' # stem & stage 1234
-    act_layer1: str = 'gelu' # stage 1234
-    act_layer2: str = 'gelu' # stage 1234
     norm_layer: str = ''
-    norm_layer_cl: str = ''
-    norm_eps: Optional[float] = None
+    norm_eps: float = 1e-5
     down_shortcut: Optional[bool] = True
     mlp: str = 'mlp'
 
-    def __post_init__(self):
-        # mbconv vs convnext blocks have different defaults, set in post_init to avoid explicit config args
-        use_mbconv = True
-        if not self.norm_layer:
-            self.norm_layer = 'batchnorm2d' if use_mbconv else 'layernorm2d'
-        if not self.norm_layer_cl and not use_mbconv:
-            self.norm_layer_cl = 'layernorm'
-        if self.norm_eps is None:
-            self.norm_eps = 1e-5 if use_mbconv else 1e-6
-        self.downsample_pool_type = self.downsample_pool_type or self.pool_type
 
 @dataclass
 class VitCfg:
-    # embed_dim: Tuple[int, ...] = (96, 192, 384, 768)
     embed_dim: Tuple[Union[int, Tuple[int, ...]], ...] = (96, 192, 384, 768)
     depths: Tuple[Union[int, Tuple[int, ...]], ...] = (2, 3, 5, 2)
     stem_width: int = 64
-    conv_cfg: VitConvCfg = VitConvCfg()
-    weight_init: str = 'vit_eff'
+    conv_cfg: VitConvCfg = field(default_factory=VitConvCfg)
     head_type: str = ""
-    stem_type: str = "stem"
-    ln2d_permute: bool = True
-    # memory_format: str=""
 
 
 def _init_conv(module, name, scheme=''):
@@ -95,6 +78,7 @@ def _init_conv(module, name, scheme=''):
         if module.bias is not None:
             nn.init.zeros_(module.bias)
 
+
 class Stem(nn.Module):
     def __init__(
             self,
@@ -126,6 +110,7 @@ class Stem(nn.Module):
 
         return x
 
+
 class Downsample2d(nn.Module):
     def __init__(
             self,
@@ -158,12 +143,10 @@ class StridedConv(nn.Module):
             stride=2, 
             padding=1,
             in_chans=3, 
-            embed_dim=768, 
-            ln2d_permute=True
+            embed_dim=768
     ):
         super().__init__()
         self.proj = nn.Conv2d(in_chans, embed_dim, kernel_size=kernel_size, stride=stride, padding=padding)
-        self.permute = ln2d_permute # TODO: disable 
         norm_layer = partial(get_norm_layer('layernorm2d'), eps=1e-6)
         self.norm = norm_layer(in_chans) # affine over C
 
@@ -354,6 +337,7 @@ class HybridEmbed(nn.Module):
         x = x.flatten(2).transpose(1, 2)
         return x
 
+
 def _create_vision_transformer(variant, pretrained=False, **kwargs):
     if kwargs.get('features_only', None):
         raise RuntimeError('features_only not implemented for Vision Transformer models.')
@@ -434,6 +418,7 @@ def vitamin_large(pretrained=False, **kwargs) -> VisionTransformer:
         'vitamin_large', backbone=stage_1_2, pretrained=pretrained, **dict(stage3_args, **kwargs))
     return model
 
+
 @register_model
 def vitamin_large_256(pretrained=False, **kwargs) -> VisionTransformer:
     backbone = MbConvStages(cfg=VitCfg(
@@ -452,6 +437,7 @@ def vitamin_large_256(pretrained=False, **kwargs) -> VisionTransformer:
         'vitamin_large_256', backbone=backbone, pretrained=pretrained, **dict(model_args, **kwargs))
     return model
 
+
 @register_model
 def vitamin_large_336(pretrained=False, **kwargs) -> VisionTransformer:
     backbone = MbConvStages(cfg=VitCfg(
@@ -470,6 +456,7 @@ def vitamin_large_336(pretrained=False, **kwargs) -> VisionTransformer:
         'vitamin_large_336', backbone=backbone, pretrained=pretrained, **dict(model_args, **kwargs))
     return model
 
+
 @register_model
 def vitamin_large_384(pretrained=False, **kwargs) -> VisionTransformer:
     backbone = MbConvStages(cfg=VitCfg(
@@ -488,6 +475,7 @@ def vitamin_large_384(pretrained=False, **kwargs) -> VisionTransformer:
         'vitamin_large_384', backbone=backbone, pretrained=pretrained, **dict(model_args, **kwargs))
     return model
 
+
 @register_model
 def vitamin_xlarge_256(pretrained=False, **kwargs) -> VisionTransformer:
     backbone = MbConvStages(cfg=VitCfg(
@@ -506,6 +494,7 @@ def vitamin_xlarge_256(pretrained=False, **kwargs) -> VisionTransformer:
         'vitamin_xlarge_256', backbone=backbone, pretrained=pretrained, **dict(model_args, **kwargs))
     return model
 
+
 @register_model
 def vitamin_xlarge_336(pretrained=False, **kwargs) -> VisionTransformer:
     backbone = MbConvStages(cfg=VitCfg(
@@ -524,6 +513,7 @@ def vitamin_xlarge_336(pretrained=False, **kwargs) -> VisionTransformer:
         'vitamin_xlarge_256', backbone=backbone, pretrained=pretrained, **dict(model_args, **kwargs))
     return model
 
+
 @register_model
 def vitamin_xlarge_384(pretrained=False, **kwargs) -> VisionTransformer:
     backbone = MbConvStages(cfg=VitCfg(
@@ -541,21 +531,3 @@ def vitamin_xlarge_384(pretrained=False, **kwargs) -> VisionTransformer:
     model = _create_vision_transformer_hybrid(
         'vitamin_xlarge_384', backbone=backbone, pretrained=pretrained, **dict(model_args, **kwargs))
     return model
-
-
-def count_params(model: nn.Module):
-    return sum([m.numel() for m in model.parameters()])
-
-def count_stage_params(model: nn.Module, prefix='none'):
-    collections = []
-    for name, m in model.named_parameters():
-        print(name)
-        if name.startswith(prefix):
-            collections.append(m.numel())
-    return sum(collections)
-
-
-if __name__ == "__main__":
-    model = timm.create_model('vitamin_large', num_classes=10).cuda()
-    # x = torch.rand([2,3,224,224]).cuda()
-    check_keys(model)