I was creating a very basic python program connecting it with database in psql.
My code is as following:
from sqlalchemy import create_engine
from sqlalchemy.orm import scoped_session, sessionmaker
engine=create_engine("postgresql+psycopg2://sidrules:password@localhost:5432/first")
db=scoped_session(sessionmaker(bind=engine))
def main():
flights=db.execute("select origin, destination, duration from flights").fetchall()
for flight in flights:
print(f"from {flight.origin} to {flight.destination} in {flight.duration} min")
if name == "main":
main()
while running the above code I am getting following error (Sorry for strange formatting):
*Traceback (most recent call last): File "select.py", line 6, in engine=create_engine("postgres+psycopg2://sidrules:secret@localhost:5432/first") File "C:\Users\Home\AppData\Local\Programs\Python\Python38-32\lib\site-packages\sqlalchemy\engine__init__.py", line 479, in create_engine return strategy.create(*args, **kwargs) File "C:\Users\Home\AppData\Local\Programs\Python\Python38-32\lib\site-packages\sqlalchemy\engine\strategies.py", line 61, in create entrypoint = u._get_entrypoint() File "C:\Users\Home\AppData\Local\Programs\Python\Python38-32\lib\site-packages\sqlalchemy\engine\url.py", line 172, in _get_entrypoint cls = registry.load(name) File "C:\Users\Home\AppData\Local\Programs\Python\Python38-32\lib\site-packages\sqlalchemy\util\langhelpers.py", line 253, in load loader = self.auto_fn(name) File "C:\Users\Home\AppData\Local\Programs\Python\Python38-32\lib\site-packages\sqlalchemy\dialects__init__.py", line 45, in _auto_fn module = import("sqlalchemy.dialects.%s" % (dialect,)).dialects File "C:\Users\Home\AppData\Local\Programs\Python\Python38-32\lib\site-packages\sqlalchemy\dialects\postgresql__init__.py", line 8, in from . import base File "C:\Users\Home\AppData\Local\Programs\Python\Python38-32\lib\site-packages\sqlalchemy\dialects\postgresql\base.py", line 954, in from uuid import UUID as _python_UUID # noqa File "C:\Users\Home\AppData\Local\Programs\Python\Python38-32\lib\uuid.py", line 57, in _AIX = platform.system() == 'AIX' File "C:\Users\Home\AppData\Local\Programs\Python\Python38-32\lib\platform.py", line 891, in system return uname().system File "C:\Users\Home\AppData\Local\Programs\Python\Python38-32\lib\platform.py", line 779, in uname node = _node() File "C:\Users\Home\AppData\Local\Programs\Python\Python38-32\lib\platform.py", line 582, in _node import socket File "C:\Users\Home\AppData\Local\Programs\Python\Python38-32\lib\socket.py", line 52, in import os, sys, io, selectors File "C:\Users\Home\AppData\Local\Programs\Python\Python38-32\lib\selectors.py", line 12, in import select File "D:\HTML\SQL\select.py", line 6, in engine=create_engine("postgres+psycopg2://sidrules:sidhhant@localhost:5432/first") File "C:\Users\Home\AppData\Local\Programs\Python\Python38-32\lib\site-packages\sqlalchemy\engine__init__.py", line 479, in create_engine return strategy.create(*args, **kwargs) File "C:\Users\Home\AppData\Local\Programs\Python\Python38-32\lib\site-packages\sqlalchemy\engine\strategies.py", line 61, in create entrypoint = u._get_entrypoint() File "C:\Users\Home\AppData\Local\Programs\Python\Python38-32\lib\site-packages\sqlalchemy\engine\url.py", line 172, in _get_entrypoint cls = registry.load(name) File "C:\Users\Home\AppData\Local\Programs\Python\Python38-32\lib\site-packages\sqlalchemy\util\langhelpers.py", line 253, in load loader = self.auto_fn(name) File "C:\Users\Home\AppData\Local\Programs\Python\Python38-32\lib\site-packages\sqlalchemy\dialects__init__.py", line 49, in _auto_fn
module = getattr(module, dialect)
AttributeError: module 'sqlalchemy.dialects' has no attribute 'postgresql'*
of which I think the last line has to worry about:
AttributeError: module 'sqlalchemy.dialects' has no attribute 'postgresql'
Thank you, for your help.
Sorry, for strange format, it's my first question.
postgres+psycopg2->postgresql+psycopg2– Ilja Everilä