[EMAIL PROTECTED] wrote:
I'd just like to test my
> understanding of this. Suppose I create the following generator
> object:
>
> g = getNextScalar(1, 2, (3, 4), 5)
>
> when the iterator reaches the tuple argument (3, 4) then, according to
> Steve and George, the * in *arg causes this tuple to be expanded into
> positional arguments, and it makes sense to do it this way. But what
> happens when getNextScalar(arg) is used instead?
Try it:
Python 2.5.1 (r251:54863, Mar 7 2008, 04:10:12)
[GCC 4.1.3 20070929 (prerelease) (Ubuntu 4.1.2-16ubuntu2)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> def a (arg):
... print arg
...
>>> def astar (*arg):
... print arg
...
>>> a(3,4)
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
TypeError: a() takes exactly 1 argument (2 given)
>>> astar(3,4)
(3, 4)
>>> a((3,4))
(3, 4)
>>> astar((3,4))
((3, 4),)
>>>
Mel.
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