CODEWITHSUNDEEP
python
adeelx
adeelx

Reputation: 605

Convert formatted log string back to LogRecord

What is the best way to convert a log string back to the LogRecord that caused that string to be generated in the first place, provided that I have the formatter string.

I know I can use regex for this, but I was wondering if there's a better way to achieve this.

Formatter:

%(asctime)s--%(name)s--%(levelname)s--%(funcName)s:%(lineno)s---%(message)s

Sample:

2014-07-28 16:46:39,221--sys.log--DEBUG--hello:61---hello world

Regex:

^(?P<asctime>.*?)--(?P<name>.*?)--(?P<levelname>.*?)--(?P<funcName>.*?):(?P<lineno>.*?)---(?P<message>.*?)$

Regex example:

import re
pattern = re.compile('^(?P<asctime>.*?)--(?P<name>.*?)--(?P<levelname>.*?)--(?P<funcName>.*?):(?P<lineno>.*?)---(?P<message>.*?)$')
print pattern.match('2014-07-28 16:46:39,221--sys.log--DEBUG--hello:61---hello world').groupdict()

Output:

{'name': 'sys.log', 'funcName': 'hello', 'lineno': '61', 'asctime': '2014-07-2816:46:39,221', 'message': 'hello world', 'levelname': 'DEBUG'}

References:

  1. https://docs.python.org/2/library/logging.html
  2. https://docs.python.org/2/howto/logging.html

Upvotes: 1

Views: 852

Answers (1)

Kijewski
Kijewski

Reputation: 26032

For this example, just split at the double-dashes:

sample = '2014-07-28 16:46:39,221--sys.log--DEBUG--hello:61---hello world'
fields = ('asctime', 'name', 'levelname', 'funcName', 'message')
values = { k: v for k, v in zip(fields, sample.split('--', len(fields) - 1)) }
# and do some mending
values['funcName'], values['lineno'] = values['funcName'].split(':')
values['message'] = values['message'][1:]

>>> values
{'asctime': '2014-07-28 16:46:39,221',
 'funcName': 'hello',
 'levelname': 'DEBUG',
 'lineno': '61',
 'message': 'hello world',
 'name': 'sys.log'}

Upvotes: 3

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