正則表達式提取消息

Question

我有一個腳本來讀取文件行..並且其中一些行包含錯誤消息..因此，我做了一個循環（這里僅用於一行）來查找那些行並提取消息：

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

我執行此腳本時遇到錯誤：/我希望它返回：

There is a technical problem in the server

Answer 1

如果它們都遵循相同的格式，則不需要正則表達式：

>>> 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.'

但是如果您必須使用它們...

>>> 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.'

---

如果需要，還可以提取其他信息：

>>> 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.')

Answer 2

嘗試這個：

import re

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

r = re.compile("^.*E Line.*'MESSAGE':[ ]*([^ ].*)$")
m = r.match(data)
if m:
    err = m.group(1)
    print(err)

當然，您應該在循環外部編譯正則表達式。