我在尝试通过 sqlalchemy 连接到远程 postgreSQL 服务器时遇到操作错误，如下所述

Question

Here is the error message:

OperationalError: (psycopg2.OperationalError) could not connect to server: No route to host
    Is the server running on host "5432" (0.0.21.56) and accepting
    TCP/IP connections on port 5432?

Here's what I've tried:

import sqlalchemy 
from sqlalchemy import create_engine
from sqlalchemy.ext.automap import automap_base
from sqlalchemy.orm import Session
engine = create_engine('postgresql+psycopg2://tcccinxdlfzchw:86b3a71b125f827c343a88d71811fa2096744455e75abd5b5e15077bb7a910cb@5432/d2lr09vchdiec3')

Base = automap_base()

Base.prepare(engine, reflect=True)

It's from this base.prepare that I am getting the above error message, and I have tried modifying my postgresql.conf file to listen to all addresses, and my pg-hba.conf file to be host all all md5. Then restarted the server, and I'm still getting the error. Have any idea?

Answer 1

I found the answer, the engine wasn't connecting simply because I wasn't providing the correct URI, which can usually be found in the details of your host site, next to port number, password, etc.