For Localhost- -------------- Create a new venv- python -m venv venv Activate venv- C:\xampp\htdocs\ChatGPT\chatgpt_api_python>venv\Scripts\activate Start project- python app.py pip install flask flask-cors openai pandas numpy python-dotenv pymupdf For Server- ------------ Create a new venv- python3 -m venv venv Activate venv- C:\xampp\htdocs\ChatGPT\chatgpt_api_python> venv\bin\activate Install library in venv- pip3 install flask flask-cors openai pandas numpy python-dotenv pymupdf Start project- C:\xampp\htdocs\ChatGPT\chatgpt_api_python> python3 app.py For Run Flask server in Background- 1- sudo apt update && sudo apt install tmux 2- tmux