to view database

list.py

import os

from sqlalchemy import create_engine
from sqlalchemy.orm import scoped_session, sessionmaker


engine = create_engine(os.getenv("DATABASE_URL"))
db = scoped_session(sessionmaker(bind=engine))

def main():
    flights = db.execute("SELECT userid FROM A").fetchall()
    for flight in flights:
         print(f"{flight.userid}")
        #print(flight)
        
if __name__ == "__main__":
    main()