[Python-Dev] Partial function application 'from the right'
Antoine Pitrou
solipsis at pitrou.net
Thu Jan 29 18:58:44 CET 2009
Hello,
Ben North <ben <at> redfrontdoor.org> writes:
>
> I find 'functools.partial' useful, but occasionally I'm unable to use it
> because it lacks a 'from the right' version. E.g., to create a function
> which splits a string on commas, you can't say
>
> # Won't work when called:
> split_comma = partial(str.split, sep = ',')
In py3k, we could also use "..." (the Ellipsis object) to denote places where an
argument is missing, so that:
split_comma = partial(str.split, ..., ',')
would do what you want.
Regards
Antoine.
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