无效的语法socket.socket

Question

我一直在遵循http://www.binarytides.com/python-socket-programming-tutorial/的python套接字教程，并对源代码进行了一些修改，以创建客户端和服务器端脚本。据我测试，服务器正在运行，没有任何问题。但是客户端给我带来了一个不是很严重的无效语法错误：

文件"client.py"，第17行

....try：

.^

以下是我的源代码：

#!/usr/bin/env python
import socket, select, string, sys

#***** prompt *****
def prompt() :
sys.stdout.write('<You> ')
sys.stdout.flush()

#***** main func *****
if __name__ == "__main__":
#if(len(sys.argv) < 3) :
#    print ("Usage : python telnet.py hostname port")
#    sys.exit()

HOST = raw_input("Enter host:\n")
PORT = int(raw_input("Enter port:\n")
try : 
    s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)  
    s.settimeout(2)
except socket.error, msg:
    print("Failed to create socket. Error code: " + str(msg[0]) + " , Error message: " + msg[1]  

#***** connect to remote host *****
try :
    s.connect((HOST, PORT))
except :    
    print ("Unable to connect")
    sys.exit()

print ("Connected to remote host. Start sending messages")
prompt()

while 1:
    socket_list = [sys.stdin, s]

    #*****  Get the list sockets which are readable *****
    read_sockets, write_sockets, error_sockets = select.select(socket_list , [], [])

    for sock in read_sockets:
        #***** incoming message from remote server *****
        if sock == s:
            data = sock.recv(4096)
            if not data :
                print ("\nDisconnected from chat server")
                sys.exit()
            else :
                #print data
                sys.stdout.write(data)
                prompt()

        #***** user entered a message *****
        else :
            msg = sys.stdin.readline()
            s.send(msg)

Answer 1

这条线

PORT = int(raw_input("Enter port:\n")

遗漏了结尾)。

经验法则:奇怪的语法错误->查看上面的代码行。