[Tutor] arguments

[Gregor Lingl]

emilia12 at mail.bg schrieb:

>Hi list,
>
>I have a function with two arguments (say f(x,y))
>and second which returns tuple (say def g(): return (xx,yy))
>
>my question is how to put returned values from g() as
>arguments to f ?
>  
>
There is a special *-operator, which inserts the components of an Argument
(which must be a sequence) into the parametersof the calling function:
 >>> def f(x,y):
    print x,y

   
 >>> def g():
    return -5,1001

 >>> f(*g())
-5 1001
 >>>
Regards,
Gregor



>the direct way generates error:
>
>f(g())
>TypeError: ff() takes exactly 2 arguments (1 given)
>
>and the hard way is
>x, y = g()
>f(x,y)
>
>is ok but it uses two extra variables. Is there a simple way
>to do this?
>
>BTW f(g()[0], g()[1]) works too, but calls function g()
>twice ...
>
>thanks in advance
>e.
>
>
>
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