CODEWITHSUNDEEP
pythonregexpython-2.7
Long Thai
Long Thai

Reputation: 817

Match many results in the same String

I'm trying to get the data from log file whose lines are in different format, but it is guaranteed that important information is put inside [], for example:

[User] has [do something] on [system] at [time]

or

[system] encounters [exception] at [time]

If it is possible, I want write a single regular expression that get all information inside each log line, i.e. the regex has to match many resutls in the same line. For example:

I'm working on python but answers in other languages or in pure regular expression are fine. Thanks

Upvotes: 1

Views: 68

Answers (2)

mogul
mogul

Reputation: 4553

Or as a compact perl one-liner. same regexp as jamylak used:

perl -pne '$_=join(", ",/\[([^\]]*)\]/g)."\n"'

Upvotes: 2

jamylak
jamylak

Reputation: 133584

>>> import re
>>> text = "[Admin] has [logged out] on [admin page] at [Monday 20 May, 11:00]"
>>> re.findall(r'\[([^\]]*)\]', text)
['Admin', 'logged out', 'admin page', 'Monday 20 May, 11:00']

Verbose:

>>> text = "[Order page] encounters [NullPointerException] at [Monday 20 May, 11:00]"
>>> re.findall(r'''\[            # a literal [ character (needs backslash escape)
                     (           # save following group
                       [^\]]     # match any character except literal ]
                       *         # match as many as possible of these
                     )           # end group
                    \]           # a literal ] character
''', text, flags=re.VERBOSE)
['Order page', 'NullPointerException', 'Monday 20 May, 11:00']

Upvotes: 3

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