ultralytics 8.0.58 new SimpleClass, fixes and updates (#1636)

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>
Co-authored-by: Laughing <61612323+Laughing-q@users.noreply.github.com>

ultralytics/yolo/data/dataloaders/stream_loaders.py

@@ -335,6 +335,7 @@ class LoadTensor:
     def __init__(self, imgs) -> None:
         self.im0 = imgs
         self.bs = imgs.shape[0]
+        self.mode = 'image'
 
     def __iter__(self):
         self.count = 0
@@ -346,6 +347,9 @@ class LoadTensor:
         self.count += 1
         return None, self.im0, self.im0, None, ''  # self.paths, im, self.im0, None, ''
 
+    def __len__(self):
+        return self.bs
+
 
 def autocast_list(source):
     """