tcp伺服器程式（tstserv.py）：
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()
tcp客戶端程式（tstclnt.py）：
from socket import *
host = 'localhost'
port = 21567
bufsiz = 1024
addr = (host, port)
tcpclisock = socket(af_inet, sock_stream)
tcpclisock.connect(addr)
while true:
data = raw_input('> ')
if not data:
break
tcpclisock.send(data)
data1 = tcpclisock.recv(bufsiz)
if not data1:
break
print data1
tcpclisock.close()
執行說明：先執行伺服器程式，作用類似於開啟伺服器保持等待客戶請求，再執行客戶端程式。
執行介面如下：
伺服器端：
d:\code\ex>python tstserv.py
waiting for connection...
...connected from: ('127.0.0.1', 2883)
waiting for connection...
...connected from: ('127.0.0.1', 2885)
waiting for connection...
...connected from: ('127.0.0.1', 2889)
waiting for connection...
...connected from: ('127.0.0.1', 2891)
waiting for connection...
...connected from: ('127.0.0.1', 2892)
waiting for connection...
...connected from: ('127.0.0.1', 2893)
waiting for connection...
客戶端：
d:\code\ex>python tstclnt.py
> 1
[thu feb 02 15:52:21 2012] 1
> 2
[thu feb 02 15:52:22 2012] 2
> 3
[thu feb 02 15:52:22 2012] 3
> 5
[thu feb 02 15:52:23 2012] 5
> 6
[thu feb 02 15:52:24 2012] 6
>
d:\code\ex>
參考《python核心程式設計》。
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