On Thu, 16 Feb 2006 08:04:43 -0800, szabi wrote:
> Hi!
>
> I have a list of three values and want to call a function with four
> parameters. I would like
> to write something like:
>
> a = [1, 2, 3]
> f(*a, 4)
>
> This is syntactically wrong, so is there a function which appends a
> value to a list and
> returns the new value, so that I could write something like this:
>
> f(list(a).functional_append(4))
Sure there is, just not as a list method. Python is a programming
language, you can write any function you like:
def functional_append(L, extra):
"""Return a new list consisting of extra appended to the items of L."""
return L + [extra]
Now call it like this:
f(functional_append(a, 4))
But in fact you can now optimize the functional_append away by just doing
this:
f(*a+[4])
and it will work.
--
Steven.
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