The line gives an error: from flask_sqlalchemy import SQLAlchemy, why?

Question

Python

The line throws an error. Why? ModuleNotFoundError: No module named 'flask_sqlalchemy' Can't install the module, it's like it doesn't exist! Although I looked in pip freeze packages (Flaks, SQLAlchemy, Flask-Sqlalchemy) everything is there and installed What should I do? I can't continue exploring the project because of this... I'm assuming it's for older versions, how do I add it now?
from flask_sqlalchemy import SQLAlchemy

Answer 1

So, of course, it is difficult to understand what is the matter.
1. Try removing and reinstalling packages.
2. Business in a virtual environment is possible.