Is 'everything' a refrence or isn't it?
Grant Edwards
grante at visi.com
Wed Jan 4 14:17:13 EST 2006
On 2006-01-04, KraftDiner <bobrien18 at yahoo.com> wrote:
> I was under the assumption that everything in python was a refrence...
It is.
> so if I code this:
> lst = [1,2,3]
> for i in lst:
> if i==2:
> i = 4
> print lst
>
> I though the contents of lst would be modified..
Nope. "i = 4" doesn't modify the object. It changes "i" to
point to a different object (one that is an integer value 4).
> (After reading that
> 'everything' is a refrence.)
> so it seems that in order to do this I need to code it like:
>
> lst = [1,2,3]
> for i in range(len(lst)):
> if lst[i] == 2:
> lst[i]=4
> print lst
>
> Have I misunderstood something?
Sort of.
You've misunderstood what the statement "i = 4" means.
--
Grant Edwards grante Yow! I'LL get it!! It's
at probably a FEW of my
visi.com ITALIAN GIRL-FRIENDS!!
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