Add @threaded decorator (#7813)

* Add `@threaded` decorator

* [pre-commit.ci] auto fixes from pre-commit.com hooks

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utils/general.py

@@ -14,6 +14,7 @@ import random
 import re
 import shutil
 import signal
+import threading
 import time
 import urllib
 from datetime import datetime
@@ -167,6 +168,16 @@ def try_except(func):
     return handler
 
 
+def threaded(func):
+    # Multi-threads a target function and returns thread. Usage: @threaded decorator
+    def wrapper(*args, **kwargs):
+        thread = threading.Thread(target=func, args=args, kwargs=kwargs, daemon=True)
+        thread.start()
+        return thread
+
+    return wrapper
+
+
 def methods(instance):
     # Get class/instance methods
     return [f for f in dir(instance) if callable(getattr(instance, f)) and not f.startswith("__")]