database.py

from sqlalchemy import create_engine, engine
from sqlalchemy.ext.declarative import declarative_base
from sqlalchemy.orm import sessionmaker

from pathlib import Path

full_path_dir = Path(__file__).resolve().parent

SQLALCHEMY_DATABASE_URL = f'sqlite:///{full_path_dir}/dbfiles/user.db'

engine = create_engine(SQLALCHEMY_DATABASE_URL, connect_args={'check_same_thread': False})

SessionLocal = sessionmaker(bind=engine, autocommit=False, autoflush=False)
Base = declarative_base()

def get_db():
    db = SessionLocal()
    try:
        yield db
    finally:
        db.close()