咦，这些内容，和我以前看内核时的东东，对应起来了。。
SELECT,POLL,EPOLL，非阻塞，异步之类的。。。
但我没有调出来。回家有空了可以看看，不用再敲打代码啦。。。
#!/usr/bin/env pythonimport socket, sys, selectport = 54321host = '127.0.0.1'spinsize = 10spinpos = 0spindir = 1def spin(): global spinsize, spinpos, spindir spinstr = '.' * spinpos + \ '|' + '.' * (spinsize - spinpos -1 ) sys.stdout.write('\r' + spinstr + ' ') sys.stdout.flush() spinpos += spindir if spinpos < 0: spindir = 1 spinpos = 1 elif spinpos >= spinsize: spinpos = 2 spindir = -1s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)s.connect((host, port))p = select.poll()p.register(s.fileno(), select.POLLIN | select.POLLERR | select.POLLHUP)while 1: results = p.poll(50) if len(results): if results[0][1] == select.POLLIN: data = s.recv(4096) if not len(data): print "\rRemote end closed connection; exiting." break sys.stdout.write("\rReceived: " + data) sys.stdout.flush() else: print "\rProblem occurred; exiting." sys.exit(0)spin()
