Python non-blocking

SetTimeout

Setblocking+select (Understanding Select)

Continue yesterday's work, this time I use select+setblocking and settimeout to make a contrast, to prove.

First I set the socket to non-blocking. Then use Select to monitor the socket.

#!/usr/bin/envpython# encoding: utf-8import socketimport threadingimport queueimport timeimport  selectclass worker (Threading. Thread):     def __init__ (Self,name,queue):         self.data=queue        super (worker,self). __init__ (Name=name)     def run (self):         for i in  range (10000):             self.data.put (i) Class customer (Threading. Thread):     def __init__ (Self,name,queue):         super (customer,self). __init__ (Name=name)         self.data=queue     def scan (self,ip,port):         s= Socket.socket (Socket.af_inet,socket. SOCK_STREAM)     &Nbsp;   s.setblocking (False)          #s. settimeout (0.1)         RESULTS=S.CONNECT_EX ((ip,port))           #print  results        a,b,c=select.select ([],[s ,],[s,],0.1) #设置超时时间0.1 seconds, here I summarize according to the previous blog post.          #当connect连接成功的时候, represents the TCP3 handshake, and becomes writable at this time          if b: #如果socket可写, represents the port is open              print port        s.close ()      def run (self):        while true:             try:                 a=self.data.get (1,5)             except:                 break             else:                 ip= ' 220.181.136.241 '                  self.scan (Ip,a) Def main ():     start=time.time ()      Queue=queue.queue ()     pool=[]    worke=worker (' Firebroo ', Queue)      worke.start ()     for i in range (:   )      a=customer (' Firebroo ', queue)          Pool.append (a)     for i in pool:         i.start ()      worke.join ()     for i in pool:         i.join ()     print time.time ()-start    del  pool[:]if __name__== ' __main__ ':     main ()

It takes about 17.5 seconds to execute. Below I use settimeout.

#!/usr/bin/envpython# encoding: utf-8import socketimport threadingimport queueimport timeimport  selectclass worker (Threading. Thread):     def __init__ (Self,name,queue):         self.data=queue        super (worker,self). __init__ (Name=name)     def run (self):         for i in  range (10000):             self.data.put (i) Class customer (Threading. Thread):     def __init__ (Self,name,queue):         super (customer,self). __init__ (Name=name)         self.data=queue     def scan (self,ip,port):         s= Socket.socket (Socket.af_inet,socket. SOCK_STREAM)          #s. setblocking (False)         s.settimeout (0.1) # To be consistent with the front, of course, set 0.1 seconds         results=s.connect_ex ((ip,port))          if results==0: #connect_ex中0代表端口开放, 3-time handshake complete              print port          #print  results         #a, B,c=select.select ([],[s,],[s,],0.1 ) #设置超时时间0.1 seconds, here I summarize according to the previous blog post.          #当connect连接成功的时候, represents the TCP3 handshake, and becomes writable at this time           #if  b: #如果socket可写, which represents the port is open         #     print port        s.close ()      def run (self):         while true:            try:                 a=self.data.get (1,5)              except:                 break             Else:                ip= ' 220.181.136.241 '                  self.scan (Ip,a) Def main ():     start=time.time ()     queue= Queue.queue ()     pool=[]    worke=worker (' Firebroo ', Queue)      worke.start ()     for i in range (:    )     a=customER (' Firebroo ', queue)         pool.append (a)     for  i in pool:        i.start ()      Worke.join ()     for i in pool:         i.join ()     print time.time ()-start    del pool[:]if  __name__== ' __main__ ':     main ()

The time is about 17.4. These two test results should be said to be the same, inevitably there will be errors.

Summary: So I can say that Python's settimeout this API is really non-blocking. And the select+setblocking effect is the same

Python non-blocking