Update app.py

app.py

@@ -264,8 +264,11 @@ def main():
 
 
 if __name__ == "__main__":
+    exit_codes = []
+    total_models = len(MAP_MODELS.keys())
     for model in MAP_MODELS.keys():
         p1 = subprocess.Popen(["pip", "install", MAP_MODELS[model]])
         o = p1.wait()
-        if o == 0:
+        exit_codes.append(o)
+    if len(exit_codes) == total_models:
             main()