{"metadata":{"kernelspec":{"name":"python3","display_name":"Python 3","language":"python"},"language_info":{"name":"python","version":"3.11.13","mimetype":"text/x-python","codemirror_mode":{"name":"ipython","version":3},"pygments_lexer":"ipython3","nbconvert_exporter":"python","file_extension":".py"},"colab":{"machine_shape":"hm","gpuType":"T4"},"accelerator":"GPU","kaggle":{"accelerator":"gpu","dataSources":[{"sourceId":20270,"databundleVersionId":1222630,"sourceType":"competition"},{"sourceId":25383,"databundleVersionId":2684322,"sourceType":"competition"},{"sourceId":9797223,"sourceType":"datasetVersion","datasetId":982170},{"sourceId":80230206,"sourceType":"kernelVersion"},{"sourceId":260782976,"sourceType":"kernelVersion"},{"sourceId":266770010,"sourceType":"kernelVersion"}],"dockerImageVersionId":31090,"isInternetEnabled":true,"language":"python","sourceType":"notebook","isGpuEnabled":true}},"nbformat_minor":4,"nbformat":4,"cells":[{"cell_type":"code","source":"import sys\nsys.path.append(\"../input/tez-lib/\")","metadata":{"trusted":true,"execution":{"iopub.status.busy":"2025-09-09T10:29:40.895791Z","iopub.execute_input":"2025-09-09T10:29:40.896050Z","iopub.status.idle":"2025-09-09T10:29:40.904242Z","shell.execute_reply.started":"2025-09-09T10:29:40.896026Z","shell.execute_reply":"2025-09-09T10:29:40.903442Z"}},"outputs":[],"execution_count":null},{"cell_type":"code","source":"# import timm\n# from pprint import pprint\n# model_names = timm.list_models(pretrained=True)\n# pprint(model_names)","metadata":{"trusted":true,"execution":{"iopub.status.busy":"2025-09-09T06:31:24.757576Z","iopub.execute_input":"2025-09-09T06:31:24.758251Z","iopub.status.idle":"2025-09-09T06:31:24.761386Z","shell.execute_reply.started":"2025-09-09T06:31:24.758225Z","shell.execute_reply":"2025-09-09T06:31:24.760629Z"}},"outputs":[],"execution_count":null},{"cell_type":"code","source":"import random\nimport numpy as np\nimport torch\nimport os\n\ndef seed_everything(seed):\n    random.seed(seed)\n    os.environ['PYTHONHASHSEED'] = str(seed)\n    np.random.seed(seed)\n    torch.manual_seed(seed)\n    torch.cuda.manual_seed(seed)\n    torch.backends.cudnn.deterministic = True\n    \nseed_everything(42)","metadata":{"trusted":true,"execution":{"iopub.status.busy":"2025-09-09T10:29:56.180474Z","iopub.execute_input":"2025-09-09T10:29:56.181211Z","iopub.status.idle":"2025-09-09T10:30:00.494357Z","shell.execute_reply.started":"2025-09-09T10:29:56.181184Z","shell.execute_reply":"2025-09-09T10:30:00.493589Z"}},"outputs":[],"execution_count":null},{"cell_type":"code","source":"import torch.nn as nn\n\nfrom tez import Tez, TezConfig\nimport tez\nimport albumentations\nimport pandas as pd\nimport cv2\nimport numpy as np\nimport timm\nimport torch.nn as nn\nfrom sklearn import metrics\nimport torch\nfrom tez.callbacks import EarlyStopping\nfrom tqdm import tqdm","metadata":{"trusted":true,"execution":{"iopub.status.busy":"2025-09-09T10:30:46.708969Z","iopub.execute_input":"2025-09-09T10:30:46.709371Z","iopub.status.idle":"2025-09-09T10:30:56.168708Z","shell.execute_reply.started":"2025-09-09T10:30:46.709347Z","shell.execute_reply":"2025-09-09T10:30:56.168123Z"}},"outputs":[],"execution_count":null},{"cell_type":"code","source":"class args:\n    batch_size = 8\n    image_size = 384\n    epochs = 10 #10\n    fold = 0","metadata":{"trusted":true,"execution":{"iopub.status.busy":"2025-09-09T10:31:42.071344Z","iopub.execute_input":"2025-09-09T10:31:42.072175Z","iopub.status.idle":"2025-09-09T10:31:42.076188Z","shell.execute_reply.started":"2025-09-09T10:31:42.072140Z","shell.execute_reply":"2025-09-09T10:31:42.075246Z"}},"outputs":[],"execution_count":null},{"cell_type":"code","source":"class CustomDataset:\n    def __init__(self, image_paths, dense_features, targets, augmentations):\n        self.image_paths = image_paths\n        self.dense_features = dense_features\n        self.targets = targets\n        self.augmentations = augmentations\n        \n    def __len__(self):\n        return len(self.image_paths)\n    \n    def __getitem__(self, item):\n        image = cv2.imread(self.image_paths[item])\n        image = cv2.cvtColor(image, cv2.COLOR_BGR2RGB)\n        \n        if self.augmentations is not None:\n            augmented = self.augmentations(image=image)\n            image = augmented[\"image\"]\n            \n        image = np.transpose(image, (2, 0, 1)).astype(np.float32)\n        \n        features = self.dense_features[item, :]\n        targets = self.targets[item]\n        \n        return {\n            \"image\": torch.tensor(image, dtype=torch.float),\n            \"features\": torch.tensor(features, dtype=torch.float),\n            \"targets\": torch.tensor(targets, dtype=torch.float),\n        }","metadata":{"trusted":true,"execution":{"iopub.status.busy":"2025-09-09T10:45:19.739618Z","iopub.execute_input":"2025-09-09T10:45:19.740201Z","iopub.status.idle":"2025-09-09T10:45:19.745707Z","shell.execute_reply.started":"2025-09-09T10:45:19.740178Z","shell.execute_reply":"2025-09-09T10:45:19.745133Z"}},"outputs":[],"execution_count":null},{"cell_type":"code","source":"class CustomModel(nn.Module):\n    def __init__(self):\n        super().__init__()        \n        self.model = timm.create_model(\"resnet50\", pretrained=True, in_chans=3)\n        self.model.fc = nn.Identity()  # Remove final layer\n        \n        self.dropout = nn.Dropout(0.5)\n        self.out = nn.Linear(2048, 1)  # ResNet50 outputs 2048 features\n        \n        self.step_scheduler_after = \"epoch\"\n\n    def monitor_metrics(self, outputs, targets, loss):\n        outputs_np = torch.sigmoid(outputs).cpu().detach().numpy()\n        targets_np = targets.cpu().detach().numpy()\n        \n        try:\n            auc = metrics.roc_auc_score(targets_np, outputs_np)\n        except:\n            auc = 0.5\n            \n        return {\"auc\": torch.tensor(auc), \"loss\": torch.tensor(loss.item())}\n\n    def optimizer_scheduler(self):\n        opt = torch.optim.AdamW(self.parameters(), lr=1e-4, weight_decay=0.01)\n        sch = torch.optim.lr_scheduler.CosineAnnealingWarmRestarts(\n            opt, T_0=10, T_mult=1, eta_min=1e-6, last_epoch=-1\n        )\n        return opt, sch\n\n    def forward(self, image, features, targets=None):\n        x = self.model(image)\n        x = self.dropout(x)\n        x = self.out(x)\n\n        if targets is not None:\n            loss = nn.BCEWithLogitsLoss()(x.view(-1), targets)\n            metrics = self.monitor_metrics(x, targets, loss)\n            return x, loss, metrics\n        return torch.sigmoid(x), 0, {}","metadata":{"trusted":true,"execution":{"iopub.status.busy":"2025-09-09T10:45:21.833906Z","iopub.execute_input":"2025-09-09T10:45:21.834179Z","iopub.status.idle":"2025-09-09T10:45:21.841054Z","shell.execute_reply.started":"2025-09-09T10:45:21.834161Z","shell.execute_reply":"2025-09-09T10:45:21.840323Z"}},"outputs":[],"execution_count":null},{"cell_type":"code","source":"train_aug = albumentations.Compose(\n    [\n#         albumentations.Resize(args.image_size, args.image_size, p=1),\n        albumentations.LongestMaxSize(args.image_size, p=1),\n        albumentations.PadIfNeeded(args.image_size,args.image_size, p=1,border_mode=0),\n        \n       albumentations.HorizontalFlip(p=0.5),\n       albumentations.VerticalFlip(p=0.1),\n       albumentations.Rotate(limit=180, p=0.5),\n       albumentations.ShiftScaleRotate(\n                shift_limit=0.1, scale_limit=0.1, rotate_limit=45, p=0.5\n            ),\n        \n        albumentations.HueSaturationValue(\n            hue_shift_limit=0.2, sat_shift_limit=0.2, val_shift_limit=0.2, p=0.5\n        ),\n        albumentations.RandomBrightnessContrast(\n            brightness_limit=(-0.1, 0.1), contrast_limit=(-0.1, 0.1), p=0.5\n        ),\n        albumentations.Normalize(\n            mean=[0.485, 0.456, 0.406],\n            std=[0.229, 0.224, 0.225],\n            max_pixel_value=255.0,\n            p=1.0,\n        ),\n    ],\n    p=1.0,\n)\n\nvalid_aug = albumentations.Compose(\n    [\n#         albumentations.Resize(args.image_size, args.image_size, p=1),\n        albumentations.LongestMaxSize(args.image_size, p=1),\n        albumentations.PadIfNeeded(args.image_size,args.image_size, p=1,border_mode=0),\n        albumentations.Normalize(\n            mean=[0.485, 0.456, 0.406],\n            std=[0.229, 0.224, 0.225],\n            max_pixel_value=255.0,\n            p=1.0,\n        ),\n    ],\n    p=1.0,\n)","metadata":{"trusted":true,"execution":{"iopub.status.busy":"2025-09-09T10:45:24.932212Z","iopub.execute_input":"2025-09-09T10:45:24.933035Z","iopub.status.idle":"2025-09-09T10:45:24.946960Z","shell.execute_reply.started":"2025-09-09T10:45:24.933009Z","shell.execute_reply":"2025-09-09T10:45:24.946030Z"}},"outputs":[],"execution_count":null},{"cell_type":"code","source":"df = pd.read_csv(\"/kaggle/input/gowtham-23bcs10168-ml-project/train_5folds.csv\")\ndf.head()","metadata":{"trusted":true,"execution":{"iopub.status.busy":"2025-09-09T10:49:08.544524Z","iopub.execute_input":"2025-09-09T10:49:08.544796Z","iopub.status.idle":"2025-09-09T10:49:08.600084Z","shell.execute_reply.started":"2025-09-09T10:49:08.544773Z","shell.execute_reply":"2025-09-09T10:49:08.599368Z"}},"outputs":[],"execution_count":null},{"cell_type":"code","source":"i=0\nprint(f'training fold: {i} start')\nargs.fold = 0\ndf_train = df[df.kfold != args.fold].reset_index(drop=True)\ndf_valid = df[df.kfold == args.fold].reset_index(drop=True)\ndense_features = [\n]\ntrain_img_paths = [f\"/kaggle/input/siim-isic-melanoma-classification/jpeg/train/{x}.jpg\" for x in df_train[\"image_name\"].values]\nvalid_img_paths = [f\"/kaggle/input/siim-isic-melanoma-classification/jpeg/train/{x}.jpg\" for x in df_valid[\"image_name\"].values]\ntrain_dataset = CustomDataset(\n    image_paths=train_img_paths,\n    dense_features=df_train[dense_features].values,\n    targets=df_train.target.values,\n    augmentations=train_aug,\n)\n\nvalid_dataset = CustomDataset(\n    image_paths=valid_img_paths,\n    dense_features=df_valid[dense_features].values,\n    targets=df_valid.target.values,\n    augmentations=valid_aug,\n)\n\nmodel = CustomModel()\nmodel = Tez(model)\n\nconfig = TezConfig(\n    training_batch_size=args.batch_size,\n    validation_batch_size=2 * args.batch_size,\n    epochs=args.epochs,\n    step_scheduler_after=\"epoch\",\n    step_scheduler_metric=\"valid_auc\",\n    fp16=True,\n    val_strategy=\"batch\",\n    val_steps=900,\n)\n\nes = EarlyStopping(\n    monitor=\"valid_auc\",\n    model_path=f\"model_f{args.fold}.bin\",\n    patience=4,\n    mode=\"max\",\n    save_weights_only=True,\n)\n\nmodel.fit(\n    train_dataset,\n    valid_dataset=valid_dataset,\n    callbacks=[es],\n    config=config,\n)\nprint(f'training fold: {i} complete')","metadata":{"trusted":true,"execution":{"iopub.status.busy":"2025-09-09T10:49:19.397048Z","iopub.execute_input":"2025-09-09T10:49:19.397660Z","iopub.status.idle":"2025-09-09T10:52:13.615298Z","shell.execute_reply.started":"2025-09-09T10:49:19.397635Z","shell.execute_reply":"2025-09-09T10:52:13.614625Z"}},"outputs":[],"execution_count":null},{"cell_type":"code","source":"","metadata":{"trusted":true},"outputs":[],"execution_count":null},{"cell_type":"code","source":"","metadata":{"trusted":true},"outputs":[],"execution_count":null},{"cell_type":"code","source":"","metadata":{"trusted":true},"outputs":[],"execution_count":null},{"cell_type":"code","source":"","metadata":{"trusted":true},"outputs":[],"execution_count":null},{"cell_type":"code","source":"","metadata":{"trusted":true},"outputs":[],"execution_count":null},{"cell_type":"code","source":"","metadata":{"trusted":true},"outputs":[],"execution_count":null},{"cell_type":"code","source":"","metadata":{"trusted":true},"outputs":[],"execution_count":null},{"cell_type":"code","source":"","metadata":{"trusted":true},"outputs":[],"execution_count":null},{"cell_type":"code","source":"","metadata":{"trusted":true},"outputs":[],"execution_count":null},{"cell_type":"code","source":"","metadata":{"trusted":true},"outputs":[],"execution_count":null},{"cell_type":"code","source":"","metadata":{"trusted":true},"outputs":[],"execution_count":null},{"cell_type":"code","source":"","metadata":{"trusted":true},"outputs":[],"execution_count":null}]}