Good use for itertools.dropwhile and itertools.takewhile

Ian Kelly ian.g.kelly at gmail.com
Tue Dec 4 20:37:38 CET 2012


On Tue, Dec 4, 2012 at 11:48 AM, Alexander Blinne <news at 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')]

>>> 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
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