python使用telnet
python 处理telnet返回的More,以及get想要的那个参数方法问题:
需要循环获取网元返回的某个参数,并计算出平均值。
解决方案:
通过expect解决返回More的问题。
通过具体的参数位置,精确获取到参数。
讨论:
参数位置固定,不好复用。
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#! usr/bin/env python # -*- coding: utf-8 -*- import telnetlib import math import time def get_param(b): "获取相应的参数,返回float型参数组" c = [] b = list (b) length = len (b) print length for x in b: c.append( float (x)) print c return c def get_avg(a): "获取平均值" length = len (a) sum = 0 for x in a: sum + = x avg = sum / length return avg def get_telnet(tn): "获取telnet数据" for command in commands: tn.write( '%s\n' % command) time.sleep( 0.5 ) ## result = tn.read_very_eager() # 不用read_all(),不能处理More print "**************" a = [] a.append( 'More' ) print a result = str () while True : b,c,d = tn.expect(a,timeout = 1 ) print b # 有More为0,无More为-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来继续 else : break print 'get result success!' print result #获取到带More的所有返回结果 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): "执行完毕后,终止Telnet连接(或输入exit退出)" tn.write( 'exit\n' ) tn.close() def open_telnet(Host, username, password, finish, commands): "Telnet远程登录" # 连接Telnet服务器 tn = telnetlib.Telnet(Host, port = 23 , timeout = 10 ) tn.set_debuglevel( 2 ) # 输入登录用户名 tn.read_until( 'Username:' ) tn.write(username + '\n' ) # 输入登录密码 tn.read_until( 'Password:' ) tn.write(password + '\n' ) # 登录完毕后执行命令 tn.read_until(finish) return tn if __name__ = = '__main__' : Host = '' # Telnet服务器IP username = '' # 登录用户名 password = '' # 登录密码 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)) ''' 运行结果: 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) 131 Telnet(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 >>> ''' |
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原文链接:https://blog.csdn.net/BigDeng_2014/article/details/76921031