[Python-ideas] Addition to operator module: starcaller

[Daniel Spitz]

Hello,

I have run into a use case where I want to create a wrapper object that
will star-unpack a sequence of arguments to pass to a function. Currently
one way to construct this is to create a function:

def starcaller(f):
    def wrapper(args):
        return f(*args)
    return wrapper

Such a function feels simple enough, and specific enough to the language,
that it would fit in well in the operator module of the standard library.
We already have a similar representation of this functionality in
itertools.starmap.

Whereas the nested function implementation above will produce unpickleable
objects (due to the closure), a straightforward c implementation will
produce pickleable ones, making them useful for parallel applications.

Thanks,
Dan Spitz
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