How to "reuse" regular expressions
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BigBear
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Posted: Wed Jan 02, 2013 8:38 pm Post subject: How to "reuse" regular expressions |
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Given a paragraph with 3 dates how can I use a regular expression to get all 3 dates.
In between the dates there are numbers and letters.
The dates are in the format
10-jan-2012
or
code: |
\d{2}-\D{3}-\d{4}\b
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I can output the first date with
code: |
m = re.search(r'\d{2}-\D{3}-\d{4}\b', s)
print m.group(0)
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but how can I output all three dates.
I can copy the regular expression and paste it again with a /D+ in between but that only works if there is only non numbers in between the dates.
Also I think that this is a silly thing to do, there has to be a way to reuse the same regular expression or get all instances of the regular expression in some text. |
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Zren
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BigBear
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Posted: Fri Jan 04, 2013 12:53 pm Post subject: RE:How to "reuse" regular expressions |
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Thank you very much.
How would you findall the peices of text that contain characters numbers and slashes in between commas?
/filepath/morepath/file.txt, /file3path/path/file3.txt
how would you make a list of all the paths ? |
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Tony
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Posted: Fri Jan 04, 2013 3:39 pm Post subject: RE:How to "reuse" regular expressions |
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dot . is a wildcard that will match any character.
Although if you know that comma is a delimiter of a list, then you are looking for "split"
code: |
>>> map(lambda x: x.strip(), "foo, bar, bazz".split(","))
['foo', 'bar', 'bazz']
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although this assumes that commas will not appear in the path/filename |
Tony's programming blog. DWITE - a programming contest. |
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