well, it can be made "static" with this:
import __builtin__
__builtin__._ = WhatEverYouWant()
cheers,
atir
On Apr 1, 4:35 pm, "Sebastian Haase" <[EMAIL PROTECTED]> wrote:
> On Tue, Apr 1, 2008 at 3:31 PM, Ondrej Certik <[EMAIL PROTECTED]> wrote:
>
> > On Tue, Apr 1, 2008 at 2:59 PM, atir ajnopse <[EMAIL PROTECTED]> wrote:
>
> > > Hi.
>
> > > I'm new to this list and was interested in sympy to use it to help
> > > implement a DSL for audio synthesis.
>
> > > I had a question: I would like to have a symbol, say "_" --without the
> > > quotation marks ;-) , which creates unique copies of itself so that
> > > the following is possible:
>
> > > f = _ + _ -> would behave as f = x + y (given x and y are Symbols),
> > > a bit like it is used in many functional languages (and not like 2 *
> > > _ )
>
> > > It should also be possible to then substitute each symbol with a value
> > > or with another symbol individually.
>
> > Yep, that is easy, just append this at the end of my script above:
>
> > print f.subs(Symbol("b"), 5)
>
> Please keep in mind thought that in Python "_" is commonly used to
> refer to the last return value. It is "quietly" overwritten when you
> use a (common) interactive shell.
> Like this:>>> 1.4*1024
> 1433.6
> >>> _/180
> 7.96444444444
> >>> _
>
> 7.96444444444
>
> I do see however that "_" would be nice for your porpuse --- is there
> maybe some other sign (i.e. valid var name) that could be used instead
> !?
>
> [[ Python 3.0 will support unicode var names, right ? ]]
>
> Regards,
> Sebastian
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