psycopg2.OperationalError：致命：密码认证

Posted 2021-04-29

我是python和postgresql的新手。这是我第一次尝试将python连接到postgresql。但是我收到此错误：

    `Traceback (most recent call last):
  File "/home/vishal/Courses/database/app.py", line 5, in <module>
    user.save_to_db()
  File "/home/vishal/Courses/database/user.py", line 13, in save_to_db
    connection = psycopg2.connect(user='postgres', password='1234', database='learning', host='localhost')
  File "/home/vishal/Courses/database/venv/lib/python3.6/site-packages/psycopg2/__init__.py", line 126, in connect
    conn = _connect(dsn, connection_factory=connection_factory, **kwasync)
psycopg2.OperationalError: FATAL:  password authentication failed for user "postgres"
FATAL:  password authentication failed for user "postgres"`

即使我尝试更改密码并使用不同的密码创建新用户，结果也相同。我要去哪里错了？

答案

我认为您默认在ident中指定的pg_hba.conf身份验证方法中尝试使用密码。尝试切换到md5。这可能会帮助https://www.liquidweb.com/kb/change-postgresql-authentication-method-from-ident-to-md5/