Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > comp.lang.python > #86220

Re: list storing variables

Show all headers | View raw

"ast" <nomail@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

Back to comp.lang.python | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread

Thread

list storing variables "ast" <nomail@invalid.com> - 2015-02-23 13:55 +0100
  Re: list storing variables Dave Angel <davea@davea.name> - 2015-02-23 08:24 -0500
  Re: list storing variables Marko Rauhamaa <marko@pacujo.net> - 2015-02-23 15:49 +0200
  Re: list storing variables Peter Pearson <pkpearson@nowhere.invalid> - 2015-02-23 17:35 +0000
    Re: list storing variables Marko Rauhamaa <marko@pacujo.net> - 2015-02-23 20:22 +0200
      Re: list storing variables Peter Otten <__peter__@web.de> - 2015-02-23 19:41 +0100
        Re: list storing variables Marko Rauhamaa <marko@pacujo.net> - 2015-02-23 21:06 +0200
          Re: list storing variables Chris Angelico <rosuav@gmail.com> - 2015-02-24 06:17 +1100
            Re: list storing variables Marko Rauhamaa <marko@pacujo.net> - 2015-02-23 22:25 +0200
          Re: list storing variables Ian Kelly <ian.g.kelly@gmail.com> - 2015-02-23 12:29 -0700
            Re: list storing variables Marko Rauhamaa <marko@pacujo.net> - 2015-02-23 22:38 +0200
  Re: list storing variables Ben Finney <ben+python@benfinney.id.au> - 2015-02-24 09:03 +1100
    Re: list storing variables Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2015-02-24 13:24 +1100
      Re: list storing variables Marko Rauhamaa <marko@pacujo.net> - 2015-02-24 10:18 +0200

csiph-web