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Groups > comp.lang.python > #46397

Getting a callable for any value?

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Is there anything like this in the standard library?

class AnyFactory(object):
def __init__(self, anything):
self.product = anything
def __call__(self):
return self.product
def __repr__(self):
return "%s.%s(%r)" % (self.__class__.__module__, self.__class__.__name__,
self.product)

my use case is:
collections.defaultdict(AnyFactory(collections.defaultdict(AnyFactory(None))))

And I think lambda expressions are not preferable...

I found itertools.repeat(anything).next and functools.partial(copy.copy,
anything)

but both of those don't repr well... and are confusing...

I think AnyFactory is the most readable, but is confusing if the reader
doesn't know what it is, am I missing a standard implementation of this?

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Getting a callable for any value? Croepha <croepha@gmail.com> - 2013-05-29 12:46 -0500
  Re: Getting a callable for any value? Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2013-05-30 06:41 +0000

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