Re: e-mail address change (was Re: [Tutor] python's default argument value handling in functions - weird syntax? problem grappling with the concept)

[Ismael Garrido]

Danny Yoo wrote:
###
def f(a,L=[]):
   if L==[5]:
       print 'L==[5] caught'
       print L
       print 'resetting L...'
       L=[]
   L.append(a)
   return L
 

###
Now I'm dizzy... I can't understand why there are two "L"!
L is a local variable of the function, right? (I can't imagine it being 
anything else) Then if I reassign L to something, why doesn't it keep 
that change till next run? At least, it keeps the values in the list.. 
so it should keep the reassignation, no?
I'm completly puzzled :-S

Ismael
_______________________________________________
Tutor maillist  -  Tutor@python.org
http://mail.python.org/mailman/listinfo/tutor