Is there an option to completely close the connection to mysql?

Question

Flask

SQLAlchemy constantly maintains a connection to the database.
Is there any way to make the connection close after the application is executed?
I tried to do like this:

@app.teardown_appcontext   
def shutdown_db(exception=None): 
    db.session.remove()
    db.session.close()

But I look with the help of lsof -i, all the same, the connection to the database is not killed.

python  6508     myflask    8u  IPv4 495690      0t0  TCP localhost:36322->localhost:mysql (ESTABLISHED)

Answer 1

@app.teardown_appcontext
def shutdown_session(exception=None):
    db.session.remove()
    db.session.close_all()
    db.engine.dispose()

This is how the connection with mysql is tightly killed.