Benji York wrote:
> Raymond Hettinger wrote:
>
>>[Fredrik Lundh]
>>
>>
>>>it is, however, a bit worrying that you end up ignoring one or more
>>>of the values in about 50% of your examples...
>>
>>It drops to about 25% when you skip the ones that don't care about the
>>found/not-found field:
>>
>>
>>>>! _, sep, port = host.partition(':')
>>>>! head, sep, _ = path.rpartition('/')
>>>>! line, _, _ = line.partition(';') # strip
>>>>! pname, found, _ = pname.rpartition('.')
>>>>! line, _, _ = line.partition('#')
>>>>! filename, _, _ = filename.partition(chr(0))
>
>
> I know it's been discussed in the past, but this makes me wonder about
> language support for "dummy" or "don't care" placeholders for tuple
> unpacking. Would the above cases benefit from that, or (as has been
> suggested in the past) should slicing be used instead?
>
> Original:
> _, sep, port = host.partition(':')
> head, sep, _ = path.rpartition('/')
> line, _, _ = line.partition(';')
> pname, found, _ = pname.rpartition('.')
> line, _, _ = line.partition('#')
>
> Slicing:
> sep, port = host.partition(':')[1:]
> head, sep = path.rpartition('/')[:2]
> line = line.partition(';')[0]
> pname, found = pname.rpartition('.')[:2]
> line = line.partition('#')[0]
>
> I think I like the original better, but can't use "_" in my code because
> it's used for internationalization.
> --
> Benji York
For cases where single values are desired, attribues could work.
Slicing:
line = line.partition(';').head
line = line.partition('#').head
But it gets awkward as soon as you want more than one.
sep, port = host.partition(':').head, host.partition(':').sep
Ron
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