AttributeError: 'NoneType' object has no attribute '_instantiate_plugins' (Cannot import create_engine)

Question

import os

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

engine=create_engine(os.getenv(\"DATABASE_URL\"))
db = scoped_se         


        

Answer 1

instead of

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

type this with your url:

   engine = create_engine("postgresql://scott:tiger@localhost/mydatabase")
   db = scoped_session(sessionmaker(bind=engine))