list storing variables
Marko Rauhamaa
marko at pacujo.net
Mon Feb 23 08:49:03 EST 2015
"ast" <nomail at invalid.com>:
> Is there a way to define a container object able to store some
> variables so that a change of a variable make a change in this object
> content ?
>
> I dont need this feature. It is just something I am thinking about.
>
> In C language, there is &A for address of A
In Python, you can accomplish "&" by creating an object:
>>> a = 3
>>> b = 4
>>> class AmpersandA:
... def get(self): return a
... def set(self, value): global a; a = value
...
>>> class AmpersandB:
... def get(self): return b
... def set(self, value): global b; b = value
...
>>> l = [ AmpersandA(), AmpersandB() ]
>>> for m in l:
... m.set(7)
...
>>> print(a)
7
>>> print(b)
7
>>>
It's exactly like "&" in C escept it's a slight bit more verbose and the
exact implementation is dependent on the name of the variable.
Marko
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