install bug fix

launch.py

@@ -1,4 +1,5 @@
 import os
+import sys
 import json
 import uuid
 import numpy as np
@@ -23,8 +24,10 @@ if not is_local_run:
         zip_ref.extractall(os.getcwd())
 
 
-os.system(f"pip install {code_dir}/gradio_model3dcolor-0.0.1-py3-none-any.whl")
-os.system(f"pip install {code_dir}/gradio_model3dnormal-0.0.1-py3-none-any.whl")
+def install(package):
+    subprocess.check_call([sys.executable, "-m", "pip", "install", package])
+install(f"{code_dir}/gradio_model3dcolor-0.0.1-py3-none-any.whl")
+install(f"{code_dir}/gradio_model3dnormal-0.0.1-py3-none-any.whl")
 from gradio_model3dcolor import Model3DColor
 from gradio_model3dnormal import Model3DNormal