"zefciu" wrote in message news:[EMAIL PROTECTED]
> Where can I find a good explanation when does an interpreter copy the
> value, and when does it create the reference. I thought I understand
> it, but I have just typed in following commands:
>
> >>> a=[[1,2],[3,4]]
> >>> b=a[1]
> >>> b=[5,6]
> >>
> Please verify before asserting:
>
> >>> a = [[1, 2], [3, 4]]
> >>> b = a[1]
> >>> b is a[1]
> True
> >>> id(b)
> 46912496915448
> >>> id(a[1])
> 46912496915448
Right, I must have had slicing on the brain.
--
http://mail.python.org/mailman/listinfo/python-list
In article <[EMAIL PROTECTED]>,
bruno at modulix <[EMAIL PROTECTED]> wrote:
> [EMAIL PROTECTED] wrote:
...
> >>And I don't understand it. I thought, that b will be a reference to a,
> >>so changing b should change a as well.
> >
> >
> > No, you've set the name b to reference a slice of a. Slici
[EMAIL PROTECTED] wrote:
>>Where can I find a good explanation when does an interpreter copy the
>>value, and when does it create the reference.
>
> Any good Python book. I have Learning Python and Programming Python 2nd
> edition and they are very good IMO.
>
>
>>I thought I understand
>>it, bu
zefciu wrote:
> Hello!
>
> Where can I find a good explanation when does an interpreter copy the
> value, and when does it create the reference.
Unless you explicitely ask for a copy (either using the copy module or a
specific function or method), you'll get a reference.
> I thought I understan
> Where can I find a good explanation when does an interpreter copy the
> value, and when does it create the reference.
Any good Python book. I have Learning Python and Programming Python 2nd
edition and they are very good IMO.
> I thought I understand
> it, but I have just typed in following comm
zefciu wrote:
> Hello!
>
> Where can I find a good explanation when does an interpreter copy the
> value, and when does it create the reference. I thought I understand
> it, but I have just typed in following commands:
>
>
a=[[1,2],[3,4]]
b=a[1]
b=[5,6]
a
>
> [[1, 2], [3, 4]]
>
zefciu wrote:
> Hello!
>
> Where can I find a good explanation when does an interpreter copy the
> value, and when does it create the reference. I thought I understand
> it, but I have just typed in following commands:
>
a=[[1,2],[3,4]]
b=a[1]
b=[5,6]
a
> [[1, 2], [3, 4]]
>>>
Hello!
Where can I find a good explanation when does an interpreter copy the
value, and when does it create the reference. I thought I understand
it, but I have just typed in following commands:
>>> a=[[1,2],[3,4]]
>>> b=a[1]
>>> b=[5,6]
>>> a
[[1, 2], [3, 4]]
>>> b
[5, 6]
And I don't understan
