[Chicago] regular expression headache

[Steve Schwarz]

For me, when it comes to writing regexps I always write a ton of test
strings ordered easy to hard and start from very short simple regexps until
they all pass.

On Saturday, January 11, 2014, Robert Spelich wrote:

> Steve,
> Thank you so much! I can't tell you how much time I spent trying to get
> this to run.
> -Bob S.
>
>
> On Sat, Jan 11, 2014 at 6:21 PM, Steve Schwarz <steve at agilitynerd.com>wrote:
>
> I tested it in python 2.5, 2.7.6 and 3.3 and it fails in all of them.
> Seems to be the "\b", when I remove it it matches.
> Steve
>
>
> On Sat, Jan 11, 2014 at 5:40 PM, Robert Spelich <rlspelich at gmail.com>wrote:
>
> import re
> address = 'PO Box 34'
> regex = re.compile("^(?:Post (?:Office )?|P[. ]?O\.? )?Box\b")
> mo = regex.search(address)
> mo
>
> This should return a match object. It returns one when I test it at
> http://www.pythonregex.com.
>
> Thanks again.-Bob
>
>
> On Sat, Jan 11, 2014 at 5:18 PM, Steve Schwarz <steve at agilitynerd.com>wrote:
>
> Bob,
> Can you post your code/tests? Then we can try it out too and help debug
> what is going on.
>
> Best Regards,
> Steve
> Blogs: http://agilitynerd.com/  http://tech.agilitynerd.com/
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>
> On Sat, Jan 11, 2014 at 4:47 PM, Robert Spelich <rlspelich at gmail.com>wrote:
>
>  Can anyone offer me a suggestion as to why a regular expression that
> validates on a testing tool would not match on the same string when run in
> a script or directly in the interpreter? I used 2 different online tools,
> one a general expression tool and one Python specific. They both matched,
> when run locally it does not match.
>
> I am using an re from a cookbook to match addresses in a database that
> start with a PO Box address. I am using 2.7. I am stumped.
>
> po_box = re.compile('^(?:Post (?:Office )?|P[. ]?O\.? )?Box\b')
>
> Thanks in advance if anyone can help me out.
>
> -Bob S.
>
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> Steve
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> Dog Agility Search: <http://googility.com/>
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>

-- 
Sent from my phone, sorry if it is brief.
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