python selectors

客户端

import socket
sock=socket.socket()

sock.connect(("127.0.0.1",8080))

while 1:
    msg=input("input>>>:")
    sock.send(msg.encode("utf8"))
    data=sock.recv(1024)
    print(data.decode("utf8"))


sock.close()

　　

服务端

import selectors
import socket

sock=socket.socket()
sock.bind(("127.0.0.1",8080))
sock.listen(5)
sock.setblocking(False)


#根据具体平台选择最佳IO多路机制，比如在Linux，选择epoll
sel=selectors.DefaultSelector()


def read(conn,mask):

    try:
        data =conn.recv(1024)
        print(data.decode("utf8"))
        msg=input(">>>:")
        conn.send(msg.encode("utf8"))
    except Exception:
        sel.unregister(conn)


def accept(sock,mask):
    conn,addr =sock.accept()
    print("conn",conn)
    sel.register(conn,selectors.EVENT_READ,read)

# 注册事件
sel.register(sock,selectors.EVENT_READ,accept)

while 1:
    print("waiting....")
    # 监听［（key1,mask1）,（key2,mask2）］
    events=sel.select()
    for key,mask in events:
        # print(key.fileobj) #conn
        # print(key.data)    #read
        func=key.data
        obj=key.fileobj

        # 1 accept(sock,mask)
        # 2 read(conn,mask)
        func(obj,mask)

　　

基于select模块实现io多路复用

import selectors  # 基于select模块实现的IO多路复用，建议大家使用

import socket

sock=socket.socket()
sock.bind(("127.0.0.1",8800))

sock.listen(5)

sock.setblocking(False)

sel=selectors.DefaultSelector() #根据具体平台选择最佳IO多路机制，比如在linux，选择epoll

def read(conn,mask):

    try:
        data=conn.recv(1024)
        print(data.decode("UTF8"))
        data2=input(">>>")
        conn.send(data2.encode("utf8"))
    except Exception:
        sel.unregister(conn)

def accept(sock,mask):

    conn, addr = sock.accept()
    print("conn",conn)
    sel.register(conn,selectors.EVENT_READ,read)

sel.register(sock,selectors.EVENT_READ,accept)  # 注册事件

while 1:

    print("wating...")
    events=sel.select()   #  监听    [(key1,mask1),(key2,mask2)]
    for key,mask in events:

        # print(key.fileobj)    # conn
        # print(key.data)       # read
        func=key.data
        obj=key.fileobj

        func(obj,mask)  # 1 accept(sock,mask)    # 2 read(conn,mask)