无法从django执行外部python脚本。

I am trying to execute a Python script from within my Django app. I tried executing it from the terminal and it works correctly, so I know the called Python script is working fine. The Python scripts calls an external program which overwrites a file on the server. The external program has all required permissions. I even tried using 777 permissions for all files involved, but still no use.I am trying to execute a Python script from wit