PyTorch Hub models default to CUDA:0 if available (#2472)

* PyTorch Hub models default to CUDA:0 if available

* device as string bug fix

hubconf.py

 from models.yolo import Model
 from utils.general import set_logging
 from utils.google_utils import attempt_download
+from utils.torch_utils import select_device
 
 dependencies = ['torch', 'yaml']
 set_logging()
                 model.names = ckpt['model'].names  # set class names attribute
             if autoshape:
                 model = model.autoshape()  # for file/URI/PIL/cv2/np inputs and NMS
-        return model
+        device = select_device('0' if torch.cuda.is_available() else 'cpu')  # default to GPU if available
+        return model.to(device)
 
     except Exception as e:
         help_url = 'https://github.com/ultralytics/yolov5/issues/36'

utils/datasets.py

         # Display cache
         nf, nm, ne, nc, n = cache.pop('results')  # found, missing, empty, corrupted, total
         if exists:
-            d = f"Scanning '{cache_path}' for images and labels... {nf} found, {nm} missing, {ne} empty, {nc} corrupted"
+            d = f"Scanning '{cache_path}' images and labels... {nf} found, {nm} missing, {ne} empty, {nc} corrupted"
             tqdm(None, desc=prefix + d, total=n, initial=n)  # display cache results
         assert nf > 0 or not augment, f'{prefix}No labels in {cache_path}. Can not train without labels. See {help_url}'
 
                 nc += 1
                 print(f'{prefix}WARNING: Ignoring corrupted image and/or label {im_file}: {e}')
 
-            pbar.desc = f"{prefix}Scanning '{path.parent / path.stem}' for images and labels... " \
+            pbar.desc = f"{prefix}Scanning '{path.parent / path.stem}' images and labels... " \
                         f"{nf} found, {nm} missing, {ne} empty, {nc} corrupted"
 
         if nf == 0:

utils/general.py

                 f"Use 'git pull' to update or 'git clone {url}' to download latest."
         else:
             s = f'up to date with {url} ✅'
-        print(s.encode().decode('ascii', 'ignore') if platform.system() == 'Windows' else s)
+        print(s.encode().decode('ascii', 'ignore') if platform.system() == 'Windows' else s)  # emoji-safe
     except Exception as e:
         print(e)
 

utils/torch_utils.py

 # PyTorch utils
-
 import logging
 import math
 import os
+import platform
 import subprocess
 import time
 from contextlib import contextmanager
 
 def select_device(device='', batch_size=None):
     # device = 'cpu' or '0' or '0,1,2,3'
-    s = f'YOLOv5 {git_describe()} torch {torch.__version__} '  # string
+    s = f'YOLOv5 🚀 {git_describe()} torch {torch.__version__} '  # string
     cpu = device.lower() == 'cpu'
     if cpu:
         os.environ['CUDA_VISIBLE_DEVICES'] = '-1'  # force torch.cuda.is_available() = False
     else:
         s += 'CPU\n'
 
-    logger.info(s)  # skip a line
+    logger.info(s.encode().decode('ascii', 'ignore') if platform.system() == 'Windows' else s)  # emoji-safe
     return torch.device('cuda:0' if cuda else 'cpu')