Add a warning for old python versions. (comfyanonymous#8504)

Author: comfyanonymous

main.py

@@ -17,7 +17,6 @@
     os.environ['HF_HUB_DISABLE_TELEMETRY'] = '1'
     os.environ['DO_NOT_TRACK'] = '1'
 
-
 setup_logger(log_level=args.verbose, use_stdout=args.log_stdout)
 
 def apply_custom_paths():
@@ -310,6 +309,9 @@ async def start_all():
     logging.info("Python version: {}".format(sys.version))
     logging.info("ComfyUI version: {}".format(comfyui_version.__version__))
 
+    if sys.version_info.major == 3 and sys.version_info.minor < 10:
+        logging.warning("WARNING: You are using a python version older than 3.10, please upgrade to a newer one. 3.12 and above is recommended.")
+
     event_loop, _, start_all_func = start_comfyui()
     try:
         x = start_all_func()