python之selectors，,selectors是

python之selectors，,selectors是

selectors是select模块的包装器，ptython文档建议大部分情况使用selectors而不是直接使用selectors

样例代码如下

# -*- coding: utf-8 -*-__author__ = ‘fc‘import selectorsimport socketimport timedef accept(sock:socket.socket, mask):    conn, addr = sock.accept()    print(‘client‘, addr, ‘connected‘)    conn.setblocking(False)    sel.register(conn, selectors.EVENT_READ, oper)def oper(sock:socket.socket, mask):    if selectors.EVENT_READ & mask:        print(‘ready to read‘)        data = sock.recv(1024)        if not data:            print(‘client‘, sock.getpeername(), ‘disconnnected‘)            sel.unregister(sock)            sock.close()        else:            print(‘received: ‘, data)            sel.modify(sock, selectors.EVENT_WRITE, oper)    elif selectors.EVENT_WRITE & mask:        print(‘ready to write‘)        msg = b‘hello, friend‘        sock.send(msg)        print(‘send: ‘, msg)        sel.modify(sock, selectors.EVENT_READ, oper)sel = selectors.DefaultSelector()print(sel)sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM, 0)sock.bind((‘‘, 60001))sock.listen(5)sock.setblocking(False)sel.register(sock, selectors.EVENT_READ, accept)while True:    events = sel.select(10)    if not events:        print(‘timeout‘, time.strftime(‘%Y-%m-%d %H:%M:%S‘))    for key, mask in events:        callback = key.data        callback(key.fileobj, mask)

python之selectors