Flask Error: "Failed to find Flask application or factory" - Troubleshooting Guide

The error message suggests that Flask was unable to find the application or factory in the "app.py" module. To resolve this issue, you can try the following steps: \n\n1. Make sure that the "app.py" file exists in the specified location: "C:/Users/dinan.lu/code/ai_di".\n\n2. Check if the Flask application or factory is properly defined in the "app.py" file. It should have something like: \n\npython\nfrom flask import Flask\n\napp = Flask(__name__) \n\n# ... (routes, views, etc.) \n\nif __name__ == "__main__":\n app.run()\n\n\n3. Verify that the module name is correct. It should be "app" without the ".py" extension.\n\n4. Double-check the spelling and case sensitivity of the module name. It should match exactly with the filename.\n\n5. If you have a factory function for creating the Flask application, make sure that it is properly imported and called in the "app.py" file.\n\n6. If you are using a virtual environment, make sure it is activated before running the Flask command.\n\n7. Try specifying the module name using the syntax "FLASK_APP=app:name" in the command prompt or terminal, replacing "name" with the name of the Flask application or factory function.\n\nFor example:\n\nFLASK_APP=app:app FLASK_ENV=development FLASK_DEBUG=0 flask run\n\n\nIf you are still experiencing issues, please provide more information about your Flask application structure and code, and any additional error messages you may be encountering.