Add retry option to get_github_assets() function (#4148)

ultralytics/engine/exporter.py

@@ -422,7 +422,7 @@ class Exporter:
                 f'{prefix} WARNING ⚠️ PNNX not found. Attempting to download binary file from '
                 'https://github.com/pnnx/pnnx/.\nNote PNNX Binary file must be placed in current working directory '
                 f'or in {ROOT}. See PNNX repo for full installation instructions.')
-            _, assets = get_github_assets(repo='pnnx/pnnx')
+            _, assets = get_github_assets(repo='pnnx/pnnx', retry=True)
             asset = [x for x in assets if ('macos' if MACOS else 'ubuntu' if LINUX else 'windows') in x][0]
             attempt_download_asset(asset, repo='pnnx/pnnx', release='latest')
             unzip_dir = Path(asset).with_suffix('')

ultralytics/engine/results.py

@@ -208,8 +208,10 @@ class Results(SimpleClass):
             model = YOLO('yolov8n.pt')
             results = model('bus.jpg')  # results list
             for r in results:
-                im = r.plot()  # BGR numpy array
-                Image.fromarray(im[..., ::-1]).show()  # show RGB image
+                im_array = r.plot()  # plot a BGR numpy array of predictions
+                im = Image.fromarray(im[..., ::-1])  # RGB PIL image
+                im.show()  # show image
+                im.save('results.jpg')  # save image
             ```
         """
         if img is None and isinstance(self.orig_img, torch.Tensor):