How do you use map(reverse, ITERABLE) with arguments to reverse?

It is possible to call reverse with arguments for example:

reverse('page', args=['page1'])

finds the url named page that takes an argument.

My question is how would I do this if I am using Python's map? I want something of this form:

map(reverse, ITERABLE)

where iterable is a bunch of of named urls with args. Thus far I have been unsuccessful at doing this.

edit based on comments and开发者_StackOverflow社区 Adam's and rulfzid's answers:

The following iterable is an example that works with both rulfzid's (editing it as my comment suggests) and Adam's answer

iterable = [['page', ['about']], ['home', None]]

My only other question is which would be faster?

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You could just use a list comprehension:

[reverse(page, args=args) for page, args in ITERABLE]

Assuming, of course, that ITERABLE is something like [(page, args), (page1, arg1), ...]

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Assuming that each item in ITERABLE is a tuple (or list) consisting of the URL and the arguments, you could use a lambda like so:

map(lambda x: reverse(x[0], args=x[1]), ITERABLE)

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It sounds like you need functools.partial.

from functools import partial
reverse_page = partial(reverse, 'page', None)
map(reverse_page, ITERABLE)

Should do the trick if you need to map:

['page1', 'page2', 'page3']

with no url_conf and page as the view.

You can use keyword args with it, but there is no reason to construct dicts if you don't need to.

It's faster than using lambda or a list comprehension for non-trivial lengths of iterable because reverse and 'page' only have to be looked up once.

Edit: If you're not actually using one argument over and over again, partial isn't what you want, just plain map:

map(reverse, ('page', 'home'), itertools.repeat(None), ('about', None))

or like this:

map(reverse, *zip(('page', None, 'about'), ('home', None, None)))

depending on how the info was organized. No need for a lambda here, lambda is slow.