paramiko 登錄linux主機后執行tail后返回數據不完整解決方法。

def get_sql_log(host,port,user,password,key_words,out_put_filename):
    commond='cd crm-app/;./tailall.sh | grep %s'%key_words
    s = paramiko.SSHClient()
    s.set_missing_host_key_policy(paramiko.AutoAddPolicy())
    s.connect(host,port,user,password)
    transport=s.get_transport()
    channel = transport.open_session()
    channel.get_pty()
    channel.exec_command(commond)
    print 'command %s'%commond
   # print '%s' % (str(host))
    f=open(out_put_filename,'a+')

   # f.write(str(dir(s)))
    while 1:
        if channel.exit_status_ready():
            break
        try:
            rl,wl,xl=select.select([channel],[],[],1)
            #print rl
            if len(rl)>0:
                recv=channel.recv(65536)
                print recv
                #print recv
                #f.seek(2)
                f.write(str(recv))
                f.flush()

        except KeyboardInterrupt:
            print("Caught control-C")
　　　　　　　　 channel.send("\x03")#發送 ctrl+c
               channel.close()
               s.close() 41             exit(0)

之前沒有加入   channel.get_pty() ，這個一直返回的信息不完整。

官方文檔這樣描述：
get_pty(*args, **kwds)

Request a pseudo-terminal from the server. This is usually used right after creating a client channel, to ask the server to provide some basic terminal semantics for a shell invoked with invoke_shell. It isn’t necessary (or desirable) to call this method if you’re going to exectue a single command with exec_command.