[ddj] Dynamic backreferences?

[Tarek Amr]

For me it is always easier to grab information from text using statistical
means rather than ruleset and regular expressions, nevertheless, I am using
similar ruleset in a tool I am working on now for my current employer, but
unfortunately, I cannot talk much about it at the moment


On Thu, Sep 26, 2013 at 11:50 AM, Patrick Maynard <
patrickmaynard.bs at gmail.com> wrote:

> *Aiden:* RTFM. There's a link at the bottom. If that doesn't work, email
> the list admins, not the entire list.
>
> *Tarek:* Thanks again. To keep this conversation semifocused on something
> on-topic, I'm curious: Have you used a script like this in your job or
> daily life?
>
> Bonus points if it was used for the reporting process. I'm always looking
> for ideas to pass along.
>
>
>
>
> On Thu, Sep 26, 2013 at 5:38 AM, Aidan Kelly <A.Kelly at gold.ac.uk> wrote:
>
>>  Since there is no unsubscribe option - please remove me from the list
>>
>> It was interesting to me for a while but as I'm not a journalist it no
>> longer is
>> Looks good for journalists however.
>>
>> Aidan Kelly BA MA
>> Senior Lecturer in Social Research Methods
>> Department of Sociology,
>> Goldsmiths, University of London
>> Lewisham Way
>> London SE14 6NW
>>
>> Email: a.kelly at gold.ac.uk
>> Landline: 02070785019
>> http://www.gold.ac.uk/sociology/staff/kelly/
>>   ------------------------------
>> *From:* data-driven-journalism-bounces at lists.okfn.org [
>> data-driven-journalism-bounces at lists.okfn.org] on behalf of Tarek Amr [
>> tarekamr at gmail.com]
>> *Sent:* 26 September 2013 00:50
>> *To:* List about Data Driven Journalism and Open Data in Journalism.
>> *Subject:* Re: [ddj] Dynamic backreferences?
>>
>>   Hi,
>>
>>  Here is a python code that should do what you want
>>
>>  def colrepeat(text):
>> ...     instr =  text.string[text.start()+1:text.end()-1]
>> ...     outstr = '<'
>> ...     for col in instr.split(','):
>> ...             outstr = outstr + ','.join([col] * 3) + ','
>> ...     outstr += '>'
>> ...     return outstr
>> ...
>> re.sub('\<[a-z\,]+\>', colrepeat, 'I like <red,green,blue> and
>> <white,black>')
>>
>>
>>
>>
>> On Wed, Sep 25, 2013 at 9:15 PM, Patrick Maynard <
>> patrickmaynard.bs at gmail.com> wrote:
>>
>>> Is there a simple way to make a regular expression generate its own back
>>> references?
>>>
>>>  For example, if I have strings "this is a <red,blue,green> set" and
>>> "this is a <red,brown,blue,green,brown> string" (and several other strings
>>> that vary in the number of color instances), and I know that the brackets
>>> will always be exclusively wrapped around the comma-delimited color list,
>>> can I write a single replacement pattern that will repeat each color three
>>> times before going to the next color?
>>>
>>>  I realize that there are a ton of much better, non-big-hammer ways of
>>> doing this. I'm just curious about this as a sort of academic exercise at
>>> this point. Is there a way to accomplish this strictly with regex?
>>>
>>>  -- Patrick
>>>
>>>
>>>
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>>>
>>
>>
>>  --
>> Best Regards
>> Tarek Amr
>>
>> http://tarekamr.appspot.com/
>>
>>
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>>
>
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-- 
Best Regards
Tarek Amr

http://tarekamr.appspot.com/
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