Accessing an instance via its memory address (instance at ...)

[Terry Hancock]

On Friday 12 November 2004 07:59 am, simon.alexandre at cetic.be wrote:
> Hi
> 
> I have a list containing several instance address, for example:
> 
> [<JavaClass instance at 00BAC290>, <JavaClass instance at 00BB0D10>,
> <JavaClass instance at 00BA5230>]
> 
> I'd like to invoke a method on each of these instance but I don't know :
> 
> 1. if its possible
> 2. how to proceed

Well, you don't do it with a pointer. ;-)

Use the list's name, index, and call:

if you have:
>>> print mylist
[<JavaClass instance at 00BAC290>, <JavaClass instance at 00BB0D10>,
<JavaClass instance at 00BA5230>]

you can do:

mylist[0].mymethod(...)

(where "..." is whatever arguments your methods take).

You can also do things like

mylist[0].__name__
mylist[0].__module__
dir(mylist[0])

to look at the instance's metadata.

I was thrown by this a bit when I first learned python too, but
python doesn't care if you stack up operators like this, and the "."
for invoking a method and the "()" for calling a callable object
are just operators, along with indexing "[]" and so on.  Mix and
match.



--
Terry Hancock ( hancock at anansispaceworks.com )
Anansi Spaceworks  http://www.anansispaceworks.com