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Date: Tue, 04 Dec 2012 20:17:19 +0000
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Subject: Re: Good use for itertools.dropwhile and itertools.takewhile
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Xref: csiph.com comp.lang.python:34250

On 2012-12-04 19:37, Ian Kelly wrote:
> On Tue, Dec 4, 2012 at 11:48 AM, Alexander Blinne <news@blinne.net
> <mailto:news@blinne.net>> wrote:
>
>     Am 04.12.2012 19:28, schrieb DJC:
>      >>>> (i for i,v in enumerate(w) if v.upper() != v).next()
>      > Traceback (most recent call last):
>      >   File "<stdin>", line 1, in <module>
>      > AttributeError: 'generator' object has no attribute 'next'
>
>     Yeah, i saw this problem right after i sent the posting. It now is
>     supposed to read like this
>
>      >>> def split_product(p):
>     ...     w = p.split(" ")
>     ...     j = next(i for i,v in enumerate(w) if v.upper() != v)
>     ...     return " ".join(w[:j]), " ".join(w[j:])
>
>
> It still fails if the product description is empty.
>
>  >>> split_product("CAPSICUM RED")
> Traceback (most recent call last):
>    File "<stdin>", line 1, in <module>
>    File "<stdin>", line 3, in split_product
> StopIteration
>
> I'm not meaning to pick on you; some of the other solutions in this
> thread also fail in that case.
>
>  >>> re.findall(r"(?m)^([A-Z\s]+) (.+)$", "CAPSICUM RED")
> [('CAPSICUM', 'RED')]
>
That's easily fixed:

 >>> re.findall(r"(?m)^([A-Z\s]+)(?: (.*))?$", "CAPSICUM RED")
[('CAPSICUM RED', '')]

>  >>> prod_desc("CAPSICUM RED")  # the second version from Neil's post
> Traceback (most recent call last):
>    File "<stdin>", line 1, in <module>
>    File "<stdin>", line 14, in prod_desc
> IndexError: string index out of range
>