连接拒绝 Postgresql

Question

这是我为使用 psycopg2 连接 Postgresql 编写的代码。我的 psql 和 pgadminIII 也在运行。

import psycopg2

connection = psycopg2.connect(dbname="gps_heatmap",user="postgres",host="localhost",password="1234")
cursor = connection.cursor()

cursor.execute("DROP TABLE IF EXISTS roads")
cursor.execute("CREATE TABLE roads (" +
                   "id SERIAL PRIMARY KEY," +
                   "name VARCHAR," + 
                   "centerline GEOMETRY)")
cursor.execute("CREATE INDEX ON roads USING GIST(centerline)")

connection.commit()

但出现以下错误：

 OperationalError                          Traceback (most recent call last)
    <ipython-input-14-03e3f214b83e> in <module>()
          1 import psycopg2
          2 
    ----> 3 connection = psycopg2.connect(dbname="gps_heatmap",user="postgres",host="localhost",password="1234",port="5432")
          4 cursor = connection.cursor()
          5 

C:\Users\*******\Anaconda3\lib\site-packages\psycopg2\__init__.py in connect(dsn, database, user, password, host, port, connection_factory, cursor_factory, async, **kwargs)
    162                 for (k, v) in items])
    163 
--> 164     conn = _connect(dsn, connection_factory=connection_factory, async=async)
    165     if cursor_factory is not None:
    166         conn.cursor_factory = cursor_factory

OperationalError: could not connect to server: Connection refused (0x0000274D/10061)
    Is the server running on host "localhost" (::1) and accepting
    TCP/IP connections on port 5432?
could not connect to server: Connection refused (0x0000274D/10061)
    Is the server running on host "localhost" (127.0.0.1) and accepting
    TCP/IP connections on port 5432?

我将 pg_hbf.conf 编辑为：host all all 0.0.0.0/0 md5

再次，同样的错误重复

Answer 1

澄清

下面的答案被接受，但是，这不是问题的解决方案...问题是 postgresql 服务器配置为端口 5433，而不是默认端口 5432。这应该可以解决问题：

connection = psycopg2.connect(database="gps_heatmap", user="postgres", password="1234", host="localhost", port=5433)

原答案

尝试替换dbname="gps_heatmap"为，database="gps_heatmap"因为前者用于在连接字符串中使用，而后者在将关键字参数传递给时使用psycopg2.connect()：

connection = psycopg2.connect(database="gps_heatmap", user="postgres", host="localhost", password="1234")

或者您可以使用连接字符串：

connection = psycopg2.connect("dbname=gps_heatmap user=postgres host=localhost password=1234")