python的單線程多任務的實現

# coding:utf-8
from socket import *

# 1.創建服務器socket
sock = socket(AF_INET, SOCK_STREAM)

# 2.綁定主機和端口
addr = ('', 7788) #
sock.bind(addr)

# 3. 設置最大監聽數目，并發
sock.listen(10)

# 4. 設置成非阻塞
sock.setblocking(False)
# 保存客戶端socket
clientAddrList = []
# print(sock.)

while 1:
 try:
 clientSocket, clientAddr = sock.accept()
 except:
 pass
 else:
 print("一個新客戶端到來：%s" % str(clientAddr))
 clientSocket.setblocking(False)
 clientAddrList.append((clientSocket, clientAddr))

 for clientSocket, clientAddr in clientAddrList:
 try:
 recvData = clientSocket.recv(1024)
 except:
 pass
 else:
 if len(recvData) > 0:
 print("%s:%s" % (str(clientAddr), recvData))
 else:
 clientSocket.close()
 clientAddrList.remove((clientSocket, clientAddr))
 print("%s 已經下線" % str(clientAddr))