使用python paramiko的exec_command无法执行延迟得到结果的命令

远程登录成功,一般的如"ls -ltr"之类也可以得到命令相应的结果，但是想要执行延迟得到结果的命令，比如sipp。
无法触发对应的结果。
下面例子中是sipp的主叫侧发起呼叫命令，在被叫侧的sipp进程已经人工开启，理论上只要主叫侧命令执行，被叫侧
至少能得到一条sip消息。



#!/usr/bin/env python
import paramiko
import time

hostname = '10.170.9.35'
port = 22
username = 'root'
password = 'mgcroot'

sipp_command_uac = './sipp.3.1.src/sipp 192.168.55.4:5060 -sf ./scenario/uac_video_amr.xml -s 1411420123456 -i 192.168.55.242 -p 5071 -mi 192.168.55.242 -mp 21310 -aa -r 20 -d 10000 -t u1 -m 1'

ls = 'ls -ltr *.py'

if __name__ == '__main__':
  paramiko.util.log_to_file('paramiko.log')
  s = paramiko.SSHClient()
  s.load_system_host_keys()
  s.connect(hostname, port, username, password)

  print type(sipp_command_uac)
  stdin, stdout, stderr = s.exec_command('cd /home/ezhuhao ;' + sipp_command_uac + '; sleep 12')

  print stdout.read()

  s.close()

我也有相同的苦恼，python似乎不能实现，你看我发过的帖子，我用python3.3的subprocess.Popen()操作，它可以传递子进程参数，并可以用PIPE读取子进程输出。可能我的理解有偏差，你试试用下，我也期待结果。
PS：我觉得你应该用list来做命令，不要用带一大堆空格的字符串做命令参数。

os.system,subprocess.Popen 可以实现本地的延时输出
下面是我写的,不过不知道怎么和远程命令整合到一起

#!/usr/bin/python
#import pexpect
import string, os, sys
import subprocess
import time

queue = True

def displayfile():
  myfile = open("/home/ezhuhao/display.log")
  input=myfile.readline()
  while (input != ''):
  print input
  input=myfile.readline()
  myfile.close()

def dis_screen(filename):
  # subprocess.Popen('grep %s /home/ezhuhao/myscreen.txt >> /home/ezhuhao/display.log' %filename , shell=True)
  # subprocess.Popen('grep "period" %s >> /home/ezhuhao/display.log' %filename , shell=True)
  # subprocess.Popen('grep "Peak" %s >> /home/ezhuhao/display.log' %filename , shell=True)
  # subprocess.Popen('grep "Successful" %s >> /home/ezhuhao/display.log' %filename , shell=True)
  # subprocess.Popen('grep "Failed" %s >> /home/ezhuhao/display.log' %filename , shell=True)

  myfile = open('/home/ezhuhao/display.log' ,'wa')
  myfile.write('++++++++++Here is the screen log++++++++++')
  myfile.close()
  time.sleep(1)
  subprocess.Popen('grep %s /home/ezhuhao/myscreen.txt >> /home/ezhuhao/display.log' %filename , shell=True)
  time.sleep(1)
  subprocess.Popen('grep "period" %s >> /home/ezhuhao/display.log' %filename , shell=True)
  time.sleep(1)
  subprocess.Popen('grep "Peak" %s >> /home/ezhuhao/display.log' %filename , shell=True)
  time.sleep(1)
  subprocess.Popen('grep "Successful" %s >> /home/ezhuhao/display.log' %filename , shell=True)
  time.sleep(1)
  subprocess.Popen('grep "Failed" %s >> /home/ezhuhao/display.log' %filename , shell=True)

def current_process():
  current_sipp_process = os.popen('ps -ef|grep sipp').readlines()
  print current_sipp_process
   
  myfile = open('testit.txt', 'w')
  for line in current_sipp_process:
  myfile.write(line)
  myfile.close()  
   
def current_screen():
  current_sipp_screen = os.popen('ls -ltr /home/ezhuhao/scenario/*_screen.log').readlines()
  myscreen = open('myscreen.txt','w')
  for line in current_sipp_screen:
  myscreen.write(line)
  myscreen.close()  
   
while queue:
  print('Please input the SCENARIO you want:search/kill/starttraffic/bye')
  traffic_scenario = raw_input()
  print traffic_scenario+(':')

  if traffic_scenario == "search":
# current_sipp_process = os.popen('ps -ef|grep sipp').readlines()
  #print current_sipp_process
  # myfile = open('/home/ezhuhao/testit.txt', 'w')
# for line in current_sipp_process:
# myfile.write(line)

  current_screen()
  outfile = open("myscreen.txt")
  line_list=[]
   
  number_of_line=0
   
  for line in outfile:
  number_of_line=number_of_line+1
  for theline in line.split():
  line_list.append(theline)
  if (len(line_list)==0):
  print 'it\'s a empty line'
  if (line_list[4] == '0'):
  print 'it\'s a empty file'
  if (line_list[8] != ''):
  dis_screen(line_list[8])
  displayfile()
   
  empty_list=[]
  line_list=empty_list
   
  outfile.close()
  # displayfile()
  #os.system("rm -rf /home/ezhuhao/display.log")
  #os.system("rm -rf /home/ezhuhao/myscreen.txt")


   
  #command for stop traffic
  if traffic_scenario == "kill":

   
  current_process()

  myfile = open("testit.txt")
  line_list=[]
   
  number_of_line=0
   
  for line in myfile: 
  number_of_line=number_of_line+1
  print ('this time get :')+line
  for theline in line.split():
  line_list.append(theline)
  print line_list
  if (len(line_list)==0):
  print 'it\'s a empty line'
  if(line_list[0] == 'root'):
  su1 = "-USR1"
  pid = su1 + " " + line_list[1]
  print pid
  # subprocess.Popen('kill %s' %pid , shell=True , close_fds=True)
  os.system('kill %s' %pid) 
   
  empty_list=[]
  line_list=empty_list
   
  myfile.close()
  print ('i find ')
  print number_of_line
  print ('lines')
   
   
   
  #command for start traffic
  if traffic_scenario == "start":
  os.system('rm -rf /home/ezhuhao/scenario/*_screen.log')
  print('Please input the traffic you want:voice')
  scenario = raw_input()
  print scenario+(':') 
  if scenario == "voice":
  os.system("./sipp-3.0.src/sipp 192.168.51.131:5060 -sf ./scenario/uas_amr.xml -i 192.168.51.242 -p 5262 -mi 192.168.51.242 -mp 20002 -aa -trace_screen -bg")
  os.system("./sipp-3.0.src/sipp 192.168.51.130:5060 -sf ./scenario/uac_amr.xml -s 4177771234567890 -i 192.168.51.242 -p 5261 -mi 192.168.51.242 -mp 21300 -aa -r 1 -d 10000 -t u1 -trace_screen -bg ")
   
  if traffic_scenario == "bye":
  os.system("rm -rf /home/ezhuhao/display.log")
  os.system("rm -rf /home/ezhuhao/myscreen.txt")
  queue = False

  if traffic_scenario == "test":
  current_screen()

  #os_output = os.system("./sipp-3.0.src/sipp 192.168.51.131:5060 -sf ./scenario/uas_amr.xml -i 192.168.51.242 -p 5299 -mi 192.168.51.242 -mp 20002 -aa -bg -trace_screen -bg").readlines()
  #aaaa=str(os_output)
  #print ('+++++++++++++++++++++')
  #print os_output 

s.exec_command()不接受list作为参数
TypeError: must be string or read-only character buffer, not list