尝试在 python 中连接时出现 PostgreSQL 错误：dsn 无效：连接选项“用户名”无效

Question

So I have got this task: You have two abstract reports made available to you on a PostgreSQL server located at: postgres://candidate.company.org/company

username = candidate password = abc

So I used this code to try connect to the database:

import psycopg2 as db
conn = db.connect(host='postgres://candidate.suade.org/company', database='randomname', user='candidate', password='abc', port='5432')

But then i receiver error message:

ProgrammingError: invalid dsn: invalid connection option "username"

As the username give is correct Can anyone help?

Answer 1

You are using the wrong parameters. In Postgres you have to use something like this:

conn = pg.DB(host="localhost", user="USERNAME", passwd="PASSWORD", dbname="DBNAME")

That should fix it.

Answer 2

if you are using psycopg2 library to connect the Postgres DB , then the connection string should be as mentioned below .

conn = psycopg2.connect(host="localhost",**user = "postgres"**,password = "postgres",database = "postgres") ;

It should be user not username .

Answer 3

Please try with below solution

import psycopg2 as db
conn = db.connect(host='localhost', dbname='randomname', user='candidate', password='abc')