try subprocess again to resolve 'daemonic processes are not allowed to have children' error

app.py

@@ -4,7 +4,6 @@ from __future__ import annotations
 
 import os
 import datetime
-import subprocess
 
 import gradio as gr
 import spaces
@@ -25,8 +24,8 @@ def run_on_gpu(input_point_cloud: gr.utils.NamedString,
     import os
     import sys
     sys.path.append(os.path.abspath('ppsurf'))
-    # os.chdir(os.path.dirname('./ppsurf'))
     from ppsurf.pps import cli_main
+    import subprocess
 
     in_file = '{}'.format(input_point_cloud.name)
 
@@ -53,8 +52,8 @@ def run_on_gpu(input_point_cloud: gr.utils.NamedString,
         ]
 
     sys.argv = args
-    cli_main()
-    # subprocess.run(call_base + call_args)
+    subprocess.run(['python'] + args)
+    # cli_main()
     print('Finished inference at {}'.format(datetime.datetime.now()))
 
     result_3d_model = out_file
@@ -80,6 +79,9 @@ def main():
     Inference takes about 2 minutes.
     '''
 
+    # can't render many input types directly in Gradio Model3D
+    # so we need to convert to supported format
+    # Gradio can't draw point clouds anyway, so we skip this for now
     # def convert_to_ply(input_point_cloud_upload: gr.utils.NamedString):
     #
     #     # add absolute path to import dirs