socket 通信代码，单线程

server.py

import socketsock=socket.socket(socket.AF_INET,socket.SOCK_STREAM)sock.bind(('localhost',7556))sock.listen(5)while True:    connection,address = sock.accept()    print "client ip is "    print address    try:        connection.settimeout(5)        buf = connection.recv(1024)        if buf == '1':            connection.send('welcome to python server!')        else:            connection.send('please go out!')    except socket.timeout:        print 'time out'    finally:        connection.close()

client.py

import socketsock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)sock.connect(('localhost',7556))import timetime.sleep(2)sock.send('1')print sock.recv(1024)sock.close()