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python-3.x - 在尝试生成设备时观察 TypeError

问题描述

我有一台 Centos 7 笔记本电脑连接到我的 LAN 端口上的设备。尝试登录我的设备并为我的自动化任务执行一些命令。我在 Centos 7 上安装了 python 3.6.4。下面是我在笔记本电脑上的 .py 脚本。

#!/usr/local/lib python3.6
import pexpect
import sys
import re

def dologin(child):
    # Enter User Name
    child.expect ('login:')
    child.sendline ('admin')

    # Enter Password
    child.expect ('Password:')
    child.sendline ('123')
    return

def doprepcommands(child):
    # Enter config prompt
    child.expect ('NOS/27179080475072>')
    child.sendline ('config')

    # Issue command
    child.expect ('NOS/27179080475072/DEBUG/Config>')
    child.sendline ('show vlan')
    child.expect ('NOS/27179080475072/DEBUG/Config>')
    child.sendline ('exit')
    child.expect ('NOS/27179080475072/DEBUG>')
    child.sendline ('exit')
    child.expect ('NOS/27179080475072')
    child.sendline ('exit')
    return

# Spawn the telnet session
child = pexpect.spawn ('telnet 192.168.1.254')

 # Display progress on screen
child.logfile = sys.stdout
dologin(child)
doprepcommands(child)

当我运行脚本时，我在 IDLE 屏幕上观察到下面提到的错误。根据在不同博客中找到的详细信息，我部分理解在我的脚本中错误地使用了“sys.stdout”（对于 python 2.7，需要以不同的方式使用）和python 3.6）。我还试图找出我调用的函数 'dologin(child)'、'doprepcommands(child)' 是否使用了 Python 3 的正确语法。

我是 Python 新手。有人可以帮我解决这个错误吗？

================= RESTART: /home/aricent/Siva/test_debug.py        =================
Traceback (most recent call last):
 File "/home/Siva/test_debug.py", line 37, in <module>
 dologin(child)
 File "/home/Siva/test_debug.py", line 8, in dologin
   child.expect ('login:')
 File "/usr/local/lib/python3.6/site-packages/pexpect/spawnbase.py",           line 341, in expect
 timeout, searchwindowsize, async_)
 File "/usr/local/lib/python3.6/site-packages/pexpect/spawnbase.py",     line 369, in expect_list
 return exp.expect_loop(timeout)
 File "/usr/local/lib/python3.6/site-packages/pexpect/expect.py",    line 111, in expect_loop
 incoming = spawn.read_nonblocking(spawn.maxread, timeout)
 File "/usr/local/lib/python3.6/site-packages/pexpect/pty_spawn.py", line 485, in read_nonblocking
 return super(spawn, self).read_nonblocking(size)
 File "/usr/local/lib/python3.6/site-packages/pexpect/spawnbase.py", line 179, in read_nonblocking
 self._log(s, 'read')
 File "/usr/local/lib/python3.6/site-packages/pexpect/spawnbase.py", line 126, in _log
 self.logfile.write(s)
 TypeError: must be str, not bytes

标签： python-3.xnetworkingnetwork-programmingtypeerrorspawning

解决方案

我通过不同博客中的一些可用讨论解决了这个问题。我已将 'spawn' 替换为 'spawnu'，现在我可以远程登录到我的设备并根据需要执行操作。child = pexpect.spawn ('telnet 192.168.1.254') child.logfile = sys.stdout

child = pexpect.spawnu ('telnet 192.168.1.254', logfile=sys.stdout, timeout = None)

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