fix multi-process

app.py

@@ -8,6 +8,7 @@ from pathlib import Path
 import torch
 import pytorch_lightning as pl
 import spaces
+import multiprocessing
 
 sys.path.append('P3-SAM')
 from demo.auto_mask import AutoMask
@@ -188,4 +189,5 @@ Input a mesh, segment it using P3-SAM on the left, and push the "Generate" butto
 
 
 if __name__ == '__main__':
+    multiprocessing.set_start_method('spawn')
     demo.launch()