Add swiftformer (#22686)

* Commit the automatically generated code

using add-new-model-like

* Update description at swiftformer.mdx file

* remove autogenerated code for MaskedImageModeling

* update weight conversion scripts

* Update modeling_swiftformer.py

* update configuration_swiftformer.py

* Update test_modeling_swiftformer.py

* update modeling code - remove einops dependency

* Update _toctree.yml

* update modeling code - remove copied from comments

* update docs

* Revert "update docs"

This reverts commit c2e05e2998fe2cd6eaee8b8cc31aca5222bac9fb.

* update docs

* remove unused reference SwiftFormerImageProcessor

* update dependency_versions_table.py

* update swiftformer.mdx

* update swiftformer.mdx

* change model output type - no attentions

* update model org name

* Fix typo

* fix copies

* Update tests/models/swiftformer/test_modeling_swiftformer.py
Co-authored-by: amyeroberts <22614925+amyeroberts@users.noreply.github.com>

* Update src/transformers/models/auto/image_processing_auto.py
Co-authored-by: amyeroberts <22614925+amyeroberts@users.noreply.github.com>

* Update src/transformers/models/auto/feature_extraction_auto.py
Co-authored-by: amyeroberts <22614925+amyeroberts@users.noreply.github.com>

* Update docs/source/en/model_doc/swiftformer.mdx
Co-authored-by: amyeroberts <22614925+amyeroberts@users.noreply.github.com>

* Update src/transformers/models/swiftformer/configuration_swiftformer.py
Co-authored-by: amyeroberts <22614925+amyeroberts@users.noreply.github.com>

* Apply suggestions from code review
Co-authored-by: amyeroberts <22614925+amyeroberts@users.noreply.github.com>

* Apply suggestions from code review
Co-Authored-By: amyeroberts <22614925+amyeroberts@users.noreply.github.com>

* Apply suggestions from code review
Co-Authored-By: amyeroberts <22614925+amyeroberts@users.noreply.github.com>

* Apply suggestions from code review
Co-Authored-By: amyeroberts <22614925+amyeroberts@users.noreply.github.com>

* Update modeling_swiftformer.py

fix-copies

* make style, make quality, fix-copies

* Apply suggestions from code review
Co-Authored-By: amyeroberts <22614925+amyeroberts@users.noreply.github.com>

* Apply suggestions from code review
Co-Authored-By: amyeroberts <22614925+amyeroberts@users.noreply.github.com>

* make style
Co-Authored-By: amyeroberts <22614925+amyeroberts@users.noreply.github.com>

* Add suggestions from code review
Co-Authored-By: amyeroberts <22614925+amyeroberts@users.noreply.github.com>

* Add suggestions from code review
Co-Authored-By: amyeroberts <22614925+amyeroberts@users.noreply.github.com>

* make fix-copies

* Update modeling_swiftformer.py

* Update modeling_swiftformer.py

* Add suggestions from code review
Co-Authored-By: amyeroberts <22614925+amyeroberts@users.noreply.github.com>

---------
Co-authored-by: amyeroberts <22614925+amyeroberts@users.noreply.github.com>

src/transformers/models/swiftformer/convert_swiftformer_original_to_hf.py

+# coding=utf-8
+# Copyright 2023 The HuggingFace Inc. team.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+"""Convert SwiftFormer checkpoints from the original implementation."""
+
+
+import argparse
+import json
+from pathlib import Path
+
+import requests
+import torch
+from huggingface_hub import hf_hub_download
+from PIL import Image
+
+from transformers import (
+    SwiftFormerConfig,
+    SwiftFormerForImageClassification,
+    ViTImageProcessor,
+)
+from transformers.utils import logging
+
+
+logging.set_verbosity_info()
+logger = logging.get_logger(__name__)
+
+device = torch.device("cpu")
+
+
+# We will verify our results on an image of cute cats
+def prepare_img():
+    url = "http://images.cocodataset.org/val2017/000000039769.jpg"
+    im = Image.open(requests.get(url, stream=True).raw)
+    return im
+
+
+def get_expected_output(swiftformer_name):
+    if swiftformer_name == "swiftformer_xs":
+        return torch.tensor([-2.1703e00, 2.1107e00, -2.0811e00, 8.8685e-01, 2.4360e-01])
+
+    elif swiftformer_name == "swiftformer_s":
+        return torch.tensor([3.9636e-01, 2.3478e-01, -1.6963e00, -1.7381e00, -8.6337e-01])
+
+    elif swiftformer_name == "swiftformer_l1":
+        return torch.tensor([-4.2768e-01, -4.7429e-01, -1.0897e00, -1.0248e00, 3.5523e-02])
+
+    elif swiftformer_name == "swiftformer_l3":
+        return torch.tensor([-2.5330e-01, 2.4211e-01, -6.0185e-01, -8.2789e-01, -6.0446e-02])
+
+
+def rename_key(dct, old, new):
+    val = dct.pop(old)
+    dct[new] = val
+
+
+def create_rename_keys(state_dict):
+    rename_keys = []
+    for k in state_dict.keys():
+        k_new = k
+        if ".pwconv" in k:
+            k_new = k_new.replace(".pwconv", ".point_wise_conv")
+        if ".dwconv" in k:
+            k_new = k_new.replace(".dwconv", ".depth_wise_conv")
+        if ".Proj." in k:
+            k_new = k_new.replace(".Proj.", ".proj.")
+        if "patch_embed" in k_new:
+            k_new = k_new.replace("patch_embed", "swiftformer.patch_embed.patch_embedding")
+        if "network" in k_new:
+            ls = k_new.split(".")
+            if ls[2].isdigit():
+                k_new = "swiftformer.encoder.network." + ls[1] + ".blocks." + ls[2] + "." + ".".join(ls[3:])
+            else:
+                k_new = k_new.replace("network", "swiftformer.encoder.network")
+        rename_keys.append((k, k_new))
+    return rename_keys
+
+
+@torch.no_grad()
+def convert_swiftformer_checkpoint(swiftformer_name, pytorch_dump_folder_path, original_ckpt):
+    """
+    Copy/paste/tweak model's weights to our SwiftFormer structure.
+    """
+
+    # define default SwiftFormer configuration
+    config = SwiftFormerConfig()
+
+    # dataset (ImageNet-21k only or also fine-tuned on ImageNet 2012), patch_size and image_size
+    config.num_labels = 1000
+    repo_id = "huggingface/label-files"
+    filename = "imagenet-1k-id2label.json"
+    id2label = json.load(open(hf_hub_download(repo_id, filename, repo_type="dataset"), "r"))
+    id2label = {int(k): v for k, v in id2label.items()}
+    config.id2label = id2label
+    config.label2id = {v: k for k, v in id2label.items()}
+
+    # size of the architecture
+    if swiftformer_name == "swiftformer_xs":
+        config.depths = [3, 3, 6, 4]
+        config.embed_dims = [48, 56, 112, 220]
+
+    elif swiftformer_name == "swiftformer_s":
+        config.depths = [3, 3, 9, 6]
+        config.embed_dims = [48, 64, 168, 224]
+
+    elif swiftformer_name == "swiftformer_l1":
+        config.depths = [4, 3, 10, 5]
+        config.embed_dims = [48, 96, 192, 384]
+
+    elif swiftformer_name == "swiftformer_l3":
+        config.depths = [4, 4, 12, 6]
+        config.embed_dims = [64, 128, 320, 512]
+
+    # load state_dict of original model, remove and rename some keys
+    if original_ckpt:
+        if original_ckpt.startswith("https"):
+            checkpoint = torch.hub.load_state_dict_from_url(original_ckpt, map_location="cpu", check_hash=True)
+        else:
+            checkpoint = torch.load(original_ckpt, map_location="cpu")
+    state_dict = checkpoint
+
+    rename_keys = create_rename_keys(state_dict)
+    for rename_key_src, rename_key_dest in rename_keys:
+        rename_key(state_dict, rename_key_src, rename_key_dest)
+
+    # load HuggingFace model
+    hf_model = SwiftFormerForImageClassification(config).eval()
+    hf_model.load_state_dict(state_dict)
+
+    # prepare test inputs
+    image = prepare_img()
+    processor = ViTImageProcessor.from_pretrained("preprocessor_config")
+    inputs = processor(images=image, return_tensors="pt")
+
+    # compare outputs from both models
+    timm_logits = get_expected_output(swiftformer_name)
+    hf_logits = hf_model(inputs["pixel_values"]).logits
+
+    assert hf_logits.shape == torch.Size([1, 1000])
+    assert torch.allclose(hf_logits[0, 0:5], timm_logits, atol=1e-3)
+
+    Path(pytorch_dump_folder_path).mkdir(exist_ok=True)
+    print(f"Saving model {swiftformer_name} to {pytorch_dump_folder_path}")
+    hf_model.save_pretrained(pytorch_dump_folder_path)
+
+
+if __name__ == "__main__":
+    parser = argparse.ArgumentParser()
+    # Required parameters
+    parser.add_argument(
+        "--swiftformer_name",
+        default="swiftformer_xs",
+        choices=["swiftformer_xs", "swiftformer_s", "swiftformer_l1", "swiftformer_l3"],
+        type=str,
+        help="Name of the SwiftFormer model you'd like to convert.",
+    )
+    parser.add_argument(
+        "--pytorch_dump_folder_path",
+        default="./converted_outputs/",
+        type=str,
+        help="Path to the output PyTorch model directory.",
+    )
+    parser.add_argument("--original_ckpt", default=None, type=str, help="Path to the original model checkpoint.")
+
+    args = parser.parse_args()
+    convert_swiftformer_checkpoint(args.swiftformer_name, args.pytorch_dump_folder_path, args.original_ckpt)

src/transformers/utils/dummy_pt_objects.py

@@ -6440,6 +6440,30 @@ class SqueezeBertPreTrainedModel(metaclass=DummyObject):
         requires_backends(self, ["torch"])
 
 
+SWIFTFORMER_PRETRAINED_MODEL_ARCHIVE_LIST = None
+
+
+class SwiftFormerForImageClassification(metaclass=DummyObject):
+    _backends = ["torch"]
+
+    def __init__(self, *args, **kwargs):
+        requires_backends(self, ["torch"])
+
+
+class SwiftFormerModel(metaclass=DummyObject):
+    _backends = ["torch"]
+
+    def __init__(self, *args, **kwargs):
+        requires_backends(self, ["torch"])
+
+
+class SwiftFormerPreTrainedModel(metaclass=DummyObject):
+    _backends = ["torch"]
+
+    def __init__(self, *args, **kwargs):
+        requires_backends(self, ["torch"])
+
+
 SWIN_PRETRAINED_MODEL_ARCHIVE_LIST = None
 
 

tests/models/swiftformer/test_modeling_swiftformer.py

+# coding=utf-8
+# Copyright 2023 The HuggingFace Inc. team. All rights reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+""" Testing suite for the PyTorch SwiftFormer model. """
+
+
+import copy
+import inspect
+import unittest
+
+from transformers import PretrainedConfig, SwiftFormerConfig
+from transformers.testing_utils import (
+    require_torch,
+    require_vision,
+    slow,
+    torch_device,
+)
+from transformers.utils import cached_property, is_torch_available, is_vision_available
+
+from ...test_configuration_common import ConfigTester
+from ...test_modeling_common import ModelTesterMixin, floats_tensor, ids_tensor
+from ...test_pipeline_mixin import PipelineTesterMixin
+
+
+if is_torch_available():
+    import torch
+    from torch import nn
+
+    from transformers import SwiftFormerForImageClassification, SwiftFormerModel
+    from transformers.models.swiftformer.modeling_swiftformer import SWIFTFORMER_PRETRAINED_MODEL_ARCHIVE_LIST
+
+
+if is_vision_available():
+    from PIL import Image
+
+    from transformers import ViTImageProcessor
+
+
+class SwiftFormerModelTester:
+    def __init__(
+        self,
+        parent,
+        batch_size=13,
+        num_channels=3,
+        is_training=True,
+        use_labels=True,
+        hidden_dropout_prob=0.1,
+        attention_probs_dropout_prob=0.1,
+        image_size=224,
+        num_labels=1000,
+        layer_depths=[3, 3, 6, 4],
+        embed_dims=[48, 56, 112, 220],
+    ):
+        self.parent = parent
+        self.batch_size = batch_size
+        self.num_channels = num_channels
+        self.is_training = is_training
+        self.use_labels = use_labels
+        self.hidden_dropout_prob = hidden_dropout_prob
+        self.attention_probs_dropout_prob = attention_probs_dropout_prob
+        self.num_labels = num_labels
+        self.image_size = image_size
+        self.layer_depths = layer_depths
+        self.embed_dims = embed_dims
+
+    def prepare_config_and_inputs(self):
+        pixel_values = floats_tensor([self.batch_size, self.num_channels, self.image_size, self.image_size])
+
+        labels = None
+        if self.use_labels:
+            labels = ids_tensor([self.batch_size], self.num_labels)
+
+        config = self.get_config()
+
+        return config, pixel_values, labels
+
+    def get_config(self):
+        return SwiftFormerConfig(
+            depths=self.layer_depths,
+            embed_dims=self.embed_dims,
+            mlp_ratio=4,
+            downsamples=[True, True, True, True],
+            hidden_act="gelu",
+            num_labels=self.num_labels,
+            down_patch_size=3,
+            down_stride=2,
+            down_pad=1,
+            drop_rate=0.0,
+            drop_path_rate=0.0,
+            use_layer_scale=True,
+            layer_scale_init_value=1e-5,
+        )
+
+    def create_and_check_model(self, config, pixel_values, labels):
+        model = SwiftFormerModel(config=config)
+        model.to(torch_device)
+        model.eval()
+        result = model(pixel_values)
+        self.parent.assertEqual(result.last_hidden_state.shape, (self.batch_size, self.embed_dims[-1], 7, 7))
+
+    def create_and_check_for_image_classification(self, config, pixel_values, labels):
+        config.num_labels = self.num_labels
+        model = SwiftFormerForImageClassification(config)
+        model.to(torch_device)
+        model.eval()
+        result = model(pixel_values, labels=labels)
+        self.parent.assertEqual(result.logits.shape, (self.batch_size, self.num_labels))
+
+        model = SwiftFormerForImageClassification(config)
+        model.to(torch_device)
+        model.eval()
+
+        pixel_values = floats_tensor([self.batch_size, self.num_channels, self.image_size, self.image_size])
+        result = model(pixel_values)
+        self.parent.assertEqual(result.logits.shape, (self.batch_size, self.num_labels))
+
+    def prepare_config_and_inputs_for_common(self):
+        (config, pixel_values, labels) = self.prepare_config_and_inputs()
+        inputs_dict = {"pixel_values": pixel_values}
+        return config, inputs_dict
+
+
+@require_torch
+class SwiftFormerModelTest(ModelTesterMixin, PipelineTesterMixin, unittest.TestCase):
+    """
+    Here we also overwrite some of the tests of test_modeling_common.py, as SwiftFormer does not use input_ids, inputs_embeds,
+    attention_mask and seq_length.
+    """
+
+    all_model_classes = (SwiftFormerModel, SwiftFormerForImageClassification) if is_torch_available() else ()
+
+    pipeline_model_mapping = (
+        {"feature-extraction": SwiftFormerModel, "image-classification": SwiftFormerForImageClassification}
+        if is_torch_available()
+        else {}
+    )
+
+    fx_compatible = False
+    test_pruning = False
+    test_resize_embeddings = False
+    test_head_masking = False
+    has_attentions = False
+
+    def setUp(self):
+        self.model_tester = SwiftFormerModelTester(self)
+        self.config_tester = ConfigTester(
+            self,
+            config_class=SwiftFormerConfig,
+            has_text_modality=False,
+            hidden_size=37,
+            num_attention_heads=12,
+            num_hidden_layers=12,
+        )
+
+    def test_config(self):
+        self.config_tester.run_common_tests()
+
+    @unittest.skip(reason="SwiftFormer does not use inputs_embeds")
+    def test_inputs_embeds(self):
+        pass
+
+    def test_model_common_attributes(self):
+        config, _ = self.model_tester.prepare_config_and_inputs_for_common()
+
+        for model_class in self.all_model_classes:
+            model = model_class(config)
+            x = model.get_output_embeddings()
+            self.assertTrue(x is None or isinstance(x, nn.Linear))
+
+    def test_forward_signature(self):
+        config, _ = self.model_tester.prepare_config_and_inputs_for_common()
+
+        for model_class in self.all_model_classes:
+            model = model_class(config)
+            signature = inspect.signature(model.forward)
+            # signature.parameters is an OrderedDict => so arg_names order is deterministic
+            arg_names = [*signature.parameters.keys()]
+
+            expected_arg_names = ["pixel_values"]
+            self.assertListEqual(arg_names[:1], expected_arg_names)
+
+    def test_model(self):
+        config_and_inputs = self.model_tester.prepare_config_and_inputs()
+        self.model_tester.create_and_check_model(*config_and_inputs)
+
+    def test_for_image_classification(self):
+        config_and_inputs = self.model_tester.prepare_config_and_inputs()
+        self.model_tester.create_and_check_for_image_classification(*config_and_inputs)
+
+    @slow
+    def test_model_from_pretrained(self):
+        for model_name in SWIFTFORMER_PRETRAINED_MODEL_ARCHIVE_LIST[:1]:
+            model = SwiftFormerModel.from_pretrained(model_name)
+            self.assertIsNotNone(model)
+
+    @unittest.skip(reason="SwiftFormer does not output attentions")
+    def test_attention_outputs(self):
+        pass
+
+    def test_hidden_states_output(self):
+        def check_hidden_states_output(inputs_dict, config, model_class):
+            model = model_class(config)
+            model.to(torch_device)
+            model.eval()
+
+            with torch.no_grad():
+                outputs = model(**self._prepare_for_class(inputs_dict, model_class))
+
+            hidden_states = outputs.hidden_states
+
+            expected_num_stages = 8
+            self.assertEqual(len(hidden_states), expected_num_stages)  # TODO
+
+            # SwiftFormer's feature maps are of shape (batch_size, embed_dims, height, width)
+            # with the width and height being successively divided by 2, after every 2 blocks
+            for i in range(len(hidden_states)):
+                self.assertEqual(
+                    hidden_states[i].shape,
+                    torch.Size(
+                        [
+                            self.model_tester.batch_size,
+                            self.model_tester.embed_dims[i // 2],
+                            (self.model_tester.image_size // 4) // 2 ** (i // 2),
+                            (self.model_tester.image_size // 4) // 2 ** (i // 2),
+                        ]
+                    ),
+                )
+
+        config, inputs_dict = self.model_tester.prepare_config_and_inputs_for_common()
+
+        for model_class in self.all_model_classes:
+            inputs_dict["output_hidden_states"] = True
+            check_hidden_states_output(inputs_dict, config, model_class)
+
+            # check that output_hidden_states also work using config
+            del inputs_dict["output_hidden_states"]
+            config.output_hidden_states = True
+
+            check_hidden_states_output(inputs_dict, config, model_class)
+
+    def test_initialization(self):
+        def _config_zero_init(config):
+            configs_no_init = copy.deepcopy(config)
+            for key in configs_no_init.__dict__.keys():
+                if "_range" in key or "_std" in key or "initializer_factor" in key or "layer_scale" in key:
+                    setattr(configs_no_init, key, 1e-10)
+                if isinstance(getattr(configs_no_init, key, None), PretrainedConfig):
+                    no_init_subconfig = _config_zero_init(getattr(configs_no_init, key))
+                    setattr(configs_no_init, key, no_init_subconfig)
+            return configs_no_init
+
+        config, inputs_dict = self.model_tester.prepare_config_and_inputs_for_common()
+
+        configs_no_init = _config_zero_init(config)
+        for model_class in self.all_model_classes:
+            model = model_class(config=configs_no_init)
+            for name, param in model.named_parameters():
+                if param.requires_grad:
+                    self.assertIn(
+                        ((param.data.mean() * 1e9) / 1e9).round().item(),
+                        [0.0, 1.0],
+                        msg=f"Parameter {name} of model {model_class} seems not properly initialized",
+                    )
+
+
+# We will verify our results on an image of cute cats
+def prepare_img():
+    image = Image.open("./tests/fixtures/tests_samples/COCO/000000039769.png")
+    return image
+
+
+@require_torch
+@require_vision
+class SwiftFormerModelIntegrationTest(unittest.TestCase):
+    @cached_property
+    def default_feature_extractor(self):
+        return ViTImageProcessor.from_pretrained("MBZUAI/swiftformer-xs") if is_vision_available() else None
+
+    @slow
+    def test_inference_image_classification_head(self):
+        model = SwiftFormerForImageClassification.from_pretrained("MBZUAI/swiftformer-xs").to(torch_device)
+
+        feature_extractor = self.default_feature_extractor
+        image = prepare_img()
+        inputs = feature_extractor(images=image, return_tensors="pt").to(torch_device)
+
+        # forward pass
+        with torch.no_grad():
+            outputs = model(**inputs)
+
+        # verify the logits
+        expected_shape = torch.Size((1, 1000))
+        self.assertEqual(outputs.logits.shape, expected_shape)
+
+        expected_slice = torch.tensor([[-2.1703e00, 2.1107e00, -2.0811e00]])
+        self.assertTrue(torch.allclose(outputs.logits[0, :3], expected_slice, atol=1e-4))