the standard print gets "delayed" somewhere inside python, however if you use
print >>sys.stderr, "whatever", 3, 4 5 that prints immediately, or so it seems to me. -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of Linan Sent: Monday, December 04, 2006 11:18 PM To: python-list@python.org Subject: Async callback in python Hi, In javascript, code could be written like this: ... var _p=XMLHttpRequest(); _p.open('GET',url,true); _p.send(null); _p.onreadystateChange=function(){ if(_p.readyState==4) cb(_p.responseText); } ... This basic AJAX code allows function to be called when it's invoked, without blocking the main process. There is same library asyncore in python. However, I can't validate it's asynchronous through code: class T(asyncore.dispatcher): def __init__(self,host,url): asyncore.dispatcher.__init__(self) self.create_socket(socket.AF_INET, socket.SOCK_STREAM) self.connect((host,80)) self.url='GET %s HTTP/1.0\r\n\r\n' % url def handle_connect(self): pass def handle_close(self): self.close() def handle_read(self): print 'READING.....' print self.recv(256) def handle_write(self): sent=self.send(self.url) self.url=self.url[sent:] t=T('aVerySlowSite','/') asyncore.loop() for i in range(0,10): print '%d in main process' % i time.sleep(1) Suppose it's asynchronous, couple of '%d in main process' lines should be mixed in the output of T.handle_read(), right? But I found that actually main process was blocked at asyncore.loop(), until the the socket was closed. My questions: 1, Did I do anything wrong? 2, Is it real asynchronous? 3, If not, where to get the real one(s)? Any comment is welcome :) -- http://mail.python.org/mailman/listinfo/python-list -- http://mail.python.org/mailman/listinfo/python-list
