Filter `matplotlib>=3.7.2` tight layout warning (#3614)

ultralytics/yolo/engine/exporter.py

@@ -201,7 +201,7 @@ class Exporter:
         if self.args.half and (engine or onnx) and self.device.type != 'cpu':
             im, model = im.half(), model.half()  # to FP16
 
-        # Warnings
+        # Filter warnings
         warnings.filterwarnings('ignore', category=torch.jit.TracerWarning)  # suppress TracerWarning
         warnings.filterwarnings('ignore', category=UserWarning)  # suppress shape prim::Constant missing ONNX warning
         warnings.filterwarnings('ignore', category=DeprecationWarning)  # suppress CoreML np.bool deprecation warning

ultralytics/yolo/utils/plotting.py

@@ -2,6 +2,7 @@
 
 import contextlib
 import math
+import warnings
 from pathlib import Path
 
 import cv2
@@ -233,6 +234,9 @@ def plot_labels(boxes, cls, names=(), save_dir=Path(''), on_plot=None):
     import pandas as pd
     import seaborn as sn
 
+    # Filter matplotlib>=3.7.2 warning
+    warnings.filterwarnings('ignore', category=UserWarning, message='The figure layout has changed to tight')
+
     # Plot dataset labels
     LOGGER.info(f"Plotting labels to {save_dir / 'labels.jpg'}... ")
     b = boxes.transpose()  # classes, boxes