Python 如何为带有彩色文本的终端运行pexpect脚本

当我在交互式会话中运行时，Pexpect可以很好地工作，但是如果它有彩色文本，那么它不仅与文本匹配，还与ansi颜色匹配。这个正则表达式非常复杂和庞大。有人能给我一些建议吗

例如：

而不仅仅是寻找：

“开放日-user@root"

它正在寻找：

“或'\x1b[1mlogout\x1b[0m'关闭” OpenDaylight。\r\r\n\r\n\x1b。\r\r\n
\r\n\x1b[36mopendaylight user\x1b[0m\x1b[1m@\x1b[0m\x1b[34mroot\x1b[0m>”

这只是表达的一部分

import pexpect
import os
def ex1():
      os.chdir("opendaylight/distribution-karaf-0.3.4-Lithium-SR4/bin/")
      child=pexpect.spawn("./karaf clean",cwd="/home/ubuntu/opendaylight/distribution-karaf-0.3.4-Lithium-SR4/bin/") 
      child.expect("opendaylight-user@root>")
      print child.before
ex1()

错误

   Traceback (most recent call last):
   File "ex07.py", line 11, in <module>
   ex1()
   File "ex07.py", line 9, in ex1
   child.expect("opendaylight-user@root>")
   File "/usr/local/lib/python2.7/dist-packages/pexpect/spawnbase.py", line 321, in expect
   timeout, searchwindowsize, async)
   File "/usr/local/lib/python2.7/dist-packages/pexpect/spawnbase.py", line 345, in expect_list
   return exp.expect_loop(timeout)
   File "/usr/local/lib/python2.7/dist-packages/pexpect/expect.py", line 107, in expect_loop
   return self.timeout(e)
   File "/usr/local/lib/python2.7/dist-packages/pexpect/expect.py", line 70, in timeout
   raise TIMEOUT(msg)
   pexpect.exceptions.TIMEOUT: Timeout exceeded.
   <pexpect.pty_spawn.spawn object at 0x7f2c5ca8ae10>
   command: ./karaf
   args: ['./karaf', 'clean']
   buffer (last 100 chars): " or '\x1b[1mlogout\x1b[0m' to shutdown     OpenDaylight.\r\r\n\r\n\x1b[36mopendaylight-user\x1b[0m\x1b[1m@\x1b[0m\x1b[34mroot\x1b[0m>"
   before (last 100 chars): " or '\x1b[1mlogout\x1b[0m' to shutdown  OpenDaylight.\r\r\n\r\n\x1b[36mopendaylight-  user\x1b[0m\x1b[1m@\x1b[0m\x1b[34mroot\x1b[0m>"
    after: <class 'pexpect.exceptions.TIMEOUT'>
    match: None
    match_index: None
    exitstatus: None
    flag_eof: False
    pid: 20699
    child_fd: 5
    closed: False
    timeout: 30
    delimiter: <class 'pexpect.exceptions.EOF'>
    logfile: None
    logfile_read: None
    logfile_send: None
    maxread: 2000
    searchwindowsize: None
    delaybeforesend: 0.05
    delayafterclose: 0.1
    delayafterterminate: 0.1
    searcher: searcher_re:
    0: re.compile("opendaylight-user@root>")

回溯（最近一次呼叫最后一次）：
文件“ex07.py”，第11行，在
ex1（）
ex1中第9行的文件“ex07.py”
孩子。期待（“开放日”）-user@root>")
expect中的文件“/usr/local/lib/python2.7/dist-packages/pexpect/spawnbase.py”，第321行
超时，搜索窗口大小，异步）
expect\u列表第345行的文件“/usr/local/lib/python2.7/dist packages/pexpect/spawnbase.py”
返回exp.expect\u循环（超时）
expect\u循环中的文件“/usr/local/lib/python2.7/dist packages/pexpect/expect.py”，第107行
返回自我超时（e）
文件“/usr/local/lib/python2.7/dist-packages/pexpect/expect.py”，第70行，超时
提升超时（msg）
pexpect.exceptions.TIMEOUT:超过超时时间。
命令：./karaf
参数：['./karaf'，'clean']
缓冲区（最后100个字符）：“或'\x1b[1mlogout\x1b[0m'关闭OpenDaylight。\r\r\n\r\n\x1b[36mopendaylight user\x1b[0m\x1b[1m@\x1b[0m\x1b[34mroot\x1b[0m>”
之前（最后100个字符）：“或'\x1b[1mlogout\x1b[0m'关闭OpenDaylight。\r\r\n\r\n\x1b[36mopendaylight-user\x1b[0m\x1b[1m@\x1b[0m\x1b[34mroot\x1b[0m>”
之后：
匹配：无
匹配索引：无
退出状态：无
flag_eof：False
pid:20699
儿童：5
关闭：错误
超时时间：30
分隔符：
日志文件：无
日志文件读取：无
日志文件发送：无
maxread:2000
searchwindowsize:无
发送前延迟：0.05
延迟后关闭：0.1
延迟后终止：0.1
搜索者：搜索者\u re:
0：重新编译（“opendaylight-user@root>")

我通过使用expect\u exact（）而不是expect（）得到了答案。expect（）与正则表达式匹配，但expect\u与字符串精确匹配

  import pexpect
  import os
  def ex1():
      os.chdir("opendaylight/distribution-karaf-0.3.4-Lithium-SR4/bin/")
      child=pexpect.spawn("./karaf clean",cwd="/home/ubuntu/opendaylight/distribution-karaf-0.3.4-Lithium-SR4/bin/") 
      child.expect_exact("\x1b[36mopendaylight-user\x1b[0m\x1b[1m@\x1b[0m\x1b[34mroot\x1b[0m>")
      print child.before
  ex1()

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我改变了。如果这还不够，请告诉我你希望搜索什么样的改变