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* in Python

Hi all,

Can someone tell me what * in the following code means/does a Google
search didnt turn up anything as i dont know what the * is called
(related to Python and i dont think Python has pointers)

def test(*args):
pass

and sometimes its;

def test(**args):
pass
Cheers

Jun 23 '06
10 1094

Bruno Desthuilliers wrote:
placid wrote:
Bruno Desthuilliers wrote:
(snip)
Why don't you try by yourself in the Python shell ? One of the nice
things with Python is that it's quite easy to explore and experiment.

i did try it in a Python shell after i learnt what it was. Like i said
*args will be a list, but when i try **args with the following code it
doesnt work


"doesn't work" is the most useless description of a problem.
def test(**args):
keys = args.keys()
for key in keys:
print key+"="+args(ke y)


you want args[key], not args(key)

And you forget to tell how you called this code and what you got.


Too much world cup means sleepless nights down here in Australia or i
would have seen the error with args(key) which suppose to be args[key]
!

FWIW:
Python 2.4.3 (#1, Jun 3 2006, 17:26:11)
[GCC 3.4.6 (Gentoo 3.4.6-r1, ssp-3.4.5-1.0, pie-8.7.9)] on linux2
Type "help", "copyright" , "credits" or "license" for more information.
def test(**kw): ... for item in kw.items():
... print "%s : %s" % item
... test()
test(parrot="de ad", walk="silly", nose="big") nose : big
parrot : dead
walk : silly test(**{'answer ':42}) answer : 42


Thanks for that now i know what * means.

Jun 24 '06 #11

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