空OperationalError psycopg2.connect

Question

我正在使用psycopg2.connect从Python创建到PostgreSQL数据库的连接。但是我得到一个空的OperationalError。有谁知道为什么会这样吗？接下来，我放置控制台的输出。

conn = psycopg2.connect(database = "medicion",user = "postgres", password = "xxxxx", host ="localhost", port = "5433")
Traceback (most recent call last):

  File "<ipython-input-24-906939287b4e>", line 1, in <module>
    conn = psycopg2.connect(database = "medicion",user = "postgres", password = "xxxxx", host ="localhost", port = "5433")

  File "C:\anaconda3\lib\site-packages\psycopg2\__init__.py", line 127, in connect
    conn = _connect(dsn, connection_factory=connection_factory, **kwasync)

OperationalError