Suppress `torch.jit.TracerWarning` on export (#6498)

export.py

@@ -45,6 +45,7 @@ import platform
 import subprocess
 import sys
 import time
+import warnings
 from pathlib import Path
 
 import torch
@@ -508,6 +509,8 @@ def parse_opt():
 
 
 def main(opt):
+    with warnings.catch_warnings():
+        warnings.filterwarnings(action='ignore', category=torch.jit.TracerWarning)  # suppress TracerWarning
         for opt.weights in (opt.weights if isinstance(opt.weights, list) else [opt.weights]):
             run(**vars(opt))