python - 正则表达式提取消息

Question

我有一个读取文件行的​​脚本..并且某些行包含错误消息..所以我做了一个循环(这里仅针对一行)来查找这些行并提取消息:

import re

data = "15:31:17 TPP    E Line 'MESSAGE': There is a technical problem in the server."

if (re.findall(".*E Line.*",data)):
    err = re.match(r'\'MESSAGE\':\s(*$)',data)
    print err

执行此脚本时出现错误:/我希望它返回:

There is a technical problem in the server

Answer 1

如果它们都遵循相同的格式，则不需要为此使用正则表达式:

>>> data = "15:31:17 TPP    E Line 'MESSAGE': There is a technical problem in the server."
>>> data.rsplit(':', 1)[1]
' There is a technical problem in the server.'

但是如果你必须使用它们......

>>> data = "15:31:17 TPP    E Line 'MESSAGE': There is a technical problem in the server."
>>> ms = re.search(r"'MESSAGE': (.*)$", data)
>>> ms.group(1)
'There is a technical problem in the server.'

---

如果您愿意，还可以提取其他信息:

>>> ms = re.match(r"(\d\d:\d\d:\d\d)\s+(\S+)\s+(\S+)\s+Line\s+'MESSAGE':\s+(.*)", data)
>>> ms.groups()
('15:31:17', 'TPP', 'E', 'There is a technical problem in the server.')