这个socket.gaierror是什么意思？

I'm new to python and going through a book, Core Python Applications 3rd Edition. This is the the first example and already I'm stumped with it. Here's the code with the error at the end. #1/usr/bin/env python

我是python的新手，经历了一本书，Core Python Applications第3版。这是第一个例子，我已经很难过了。这是最后有错误的代码。＃1 / usr / bin / env python

from socket import *
from time import ctime

HOST = ' '
PORT = 21567
BUFSIZ = 1024
ADDR = (HOST, PORT)

tcpSerSock = socket(AF_INET, SOCK_STREAM)
tcpSerSock.bind(ADDR)
tcpSerSock.listen(5)

    while True:
        print 'waiting for connection...'
        tcpCliSock, addr = tcpSerSock.accept()
        print "...connected from:", addr

        while True:
        data = tcpCliSock.recv(BUFSIZ)
        if not data:
            break
        tcpCliSock.send("[%s] %s" % (ctime(), data))

    tcpCliSock.close()
tcpSerSock.close()

Traceback (most recent call last):
  File "tsTserv.py", line 12, in <module>
    tcpSerSock.bind(ADDR)
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/socket.py", line 224, in meth
socket.gaierror: [Errno 8] nodename nor servname provided, or not known

What does this mean?

这是什么意思？

2 个解决方案

#1

It means that your given host name ' ' is invalid (gai stands for getaddrinfo()).

这意味着您的主机名''无效（gai代表getaddrinfo（））。

As NPE already states, maybe an empty string '' would be more appropriate than a space ' '.

正如NPE已经陈述的那样，也许空字符串''比空格更合适''。

#2

The

该

HOST = ' '

should read

应该读

HOST = ''

(i.e. no space between the quotes).

（即引号之间没有空格）。

The reason you're getting the error is that ' ' is not a valid hostname. In this context, '' has a special meaning (it basically means "all local addresses").

您收到错误的原因是''不是有效的主机名。在这种情况下，''具有特殊含义（它基本上意味着“所有本地地址”）。

#1