問題：

需要循環獲取網元返回的某個參數，并計算出平均值。

解決方案：

通過expect解決返回More的問題。

通過具體的參數位置，精確獲取到參數。

討論：

參數位置固定，不好復用。

#! usr/bin/env python# -*- coding: utf-8 -*-import telnetlibimport mathimport timedef get_param(b): "獲取相應的參數，返回float型參數組" c = [] b = list(b) length = len(b) print length for x in b: c.append(float(x)) print c return cdef get_avg(a): "獲取平均值" length = len(a) sum = 0 for x in a: sum += x avg = sum/length return avgdef get_telnet(tn): "獲取telnet數據" for command in commands:  tn.write('%s/n' % command) time.sleep(0.5)## result = tn.read_very_eager() # 不用read_all()，不能處理More print "**************" a = [] a.append('More') print a result = str() while True:  b,c,d = tn.expect(a,timeout=1)  print b # 有More為0，無More為-1  print 'cccccccccccccccccccccccccccccccccccccccccccc'  print c  print 'dddddddddddddddddddddddddddddddddddddddddddd'  print d  result += d  if 0 == b:  print "There has 'More'!!!"  tn.write(r' ') #不用/r/n來繼續  else:  break print 'get result success!' print result #獲取到帶More的所有返回結果  a = result.split('/r/n') # 不要加r length = len(a) print length b = a[1].split(' ') print b print a[32] c = a[32] d = c.split(' ') print d length = len(d) print d[8] e = d[8].split('(') print e[0] return e[0] def close_telnet(tn): "執行完畢后，終止Telnet連接（或輸入exit退出）" tn.write('exit/n') tn.close() def open_telnet(Host, username, password, finish, commands):  "Telnet遠程登錄" # 連接Telnet服務器  tn = telnetlib.Telnet(Host, port=23, timeout=10)  tn.set_debuglevel(2) # 輸入登錄用戶名  tn.read_until('Username:')  tn.write(username + '/n')  # 輸入登錄密碼  tn.read_until('Password:')  tn.write(password + '/n') # 登錄完畢后執行命令  tn.read_until(finish)  return tn if __name__=='__main__':  Host = '' # Telnet服務器IP  username = '' # 登錄用戶名  password = '' # 登錄密碼  finish = '#' # 命令提示符 param = [] commands = ['sho optical-module-info xgei-1/3/1'] tn = open_telnet(Host, username, password, finish, commands) for i in range(1,10): param.append(get_telnet(tn)) close_telnet(tn) print param print get_avg(get_param(param)) '''運行結果：37['Optical', 'Module', 'Position', ':', 'xgei-1/3/1']Bias-Upper : 131(mA)  Bias-Lower : 0(mA)['Bias-Upper', '', '', '', '', '', '', ':', '131(mA)', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', 'Bias-Lower', '', '', '', '', '', '', ':', '0(mA)']131(mA)131Telnet(172.10.1.123,23): send 'exit/n'['131', '131', '131', '131', '131', '131', '131', '131', '131']9[131.0, 131.0, 131.0, 131.0, 131.0, 131.0, 131.0, 131.0, 131.0]131.0>>> '''

以上這篇python 處理telnet返回的More,以及get想要的那個參數方法就是小編分享給大家的全部內容了，希望能給大家一個參考，也希望大家多多支持武林站長站。