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When is it a pointer (aka reference) - when is it a copy?

Hi list,

Just to make sure I understand this.

Since there is no "pointer" type in Python, I like to know how I do
that.

For instance, if I do:

...some_huge_li st is a huge list...
some_huge_list[0]=1
aref = some_huge_list
aref[0]=0
print some_huge_list[0]

we know that the answere will be 0. In this case, aref is really a
reference.

But what if the right hand side is a simple variable (say an int)? Can
I "reference" it somehow? Should I assume that:

aref = _any_type_other _than_simple_on e

be a reference, and not a copy?

Thanks,

Sep 13 '06
12 1646
Fredrik Lundh wrote:
this article

http://effbot.org/zone/python-objects.htm

may be useful for those who haven't already seen it.
I don't know how many times I've referred to, or paraphrased,
that article. Shouldn't it be incorporated into the standard
tutorial? I think it's very helpful for people who are used
to the way C etc handles variables.
Sep 19 '06 #11

Magnus Lycka schrieb:
http://effbot.org/zone/python-objects.htm
may be useful for those who haven't already seen it.

Shouldn't it be incorporated into the standard tutorial?
I think it's very helpful for people who are used
to the way C etc handles variables.
That would also be a good headline. "informatio n for those coming from
C", and it should be possible to grow similiar sections for those
comming from Java or PERL.

At least it belongs into the FAQ :)

Harald

Sep 19 '06 #12
On 9/19/06, Magnus Lycka <ly***@carmen.s ewrote:
Fredrik Lundh wrote:
this article

http://effbot.org/zone/python-objects.htm

may be useful for those who haven't already seen it.

I don't know how many times I've referred to, or paraphrased,
that article. Shouldn't it be incorporated into the standard
tutorial? I think it's very helpful for people who are used
to the way C etc handles variables.
I agree. These two, also:

http://effbot.org/zone/unicode-objects.htm
http://effbot.org/zone/import-confusion.htm

And probably more...

--
Cheers,
Simon B,
si***@brunningo nline.net
Sep 19 '06 #13

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