That might be the case for more complex objects...
Steve Holden
steve at holdenweb.com
Sun Apr 15 12:57:25 EDT 2007
James Stroud wrote:
> Bart Willems wrote:
>> Dennis Lee Bieber wrote:
[...]
>> Lists behave as described above, integers and floats don't.
>>
>> By the way, a classic language like C has features like this too;
>> they're called pointers.
>
> I think that after a += 1, a memory location with a 6 is created and now
> a points to that because += has assignment buried in it.
This is the difference between mutable and immutable types.
>>> a = 5
>>> b = a
>>> a += 1
>>> a
6
>>> b
5
>>> a = [1,2,3,4,5]
>>> b = a
>>> a += [6,7,8]
>>> a
[1, 2, 3, 4, 5, 6, 7, 8]
>>> b
[1, 2, 3, 4, 5, 6, 7, 8]
>>>
regards
Steve
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