ultralytics 8.0.136 refactor and simplify package (#3748)

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>
Co-authored-by: Glenn Jocher <glenn.jocher@ultralytics.com>

ultralytics/utils/patches.py

@@ -0,0 +1,45 @@
+# Ultralytics YOLO 🚀, AGPL-3.0 license
+"""
+Monkey patches to update/extend functionality of existing functions
+"""
+
+from pathlib import Path
+
+import cv2
+import numpy as np
+import torch
+
+# OpenCV Multilanguage-friendly functions ------------------------------------------------------------------------------
+_imshow = cv2.imshow  # copy to avoid recursion errors
+
+
+def imread(filename, flags=cv2.IMREAD_COLOR):
+    return cv2.imdecode(np.fromfile(filename, np.uint8), flags)
+
+
+def imwrite(filename, img):
+    try:
+        cv2.imencode(Path(filename).suffix, img)[1].tofile(filename)
+        return True
+    except Exception:
+        return False
+
+
+def imshow(path, im):
+    _imshow(path.encode('unicode_escape').decode(), im)
+
+
+# PyTorch functions ----------------------------------------------------------------------------------------------------
+_torch_save = torch.save  # copy to avoid recursion errors
+
+
+def torch_save(*args, **kwargs):
+    """Use dill (if exists) to serialize the lambda functions where pickle does not do this."""
+    try:
+        import dill as pickle
+    except ImportError:
+        import pickle
+
+    if 'pickle_module' not in kwargs:
+        kwargs['pickle_module'] = pickle
+    return _torch_save(*args, **kwargs)