hello list, i hope this is not completely OT, since python is so well 
integrated into csound.

be warned that i'm a complete beginner, i'm just trying to teach myself the
basics reading a few tutorials.

here's my question: i defined a function with a list as its only
parameter, and at certain point i need to retrieve the actual name of the
list passed as argument.

for example:

def my_function(my_list):
	# some code processing the list

when i call my_function(foo), foo being a list, i need to print the name
"foo" as a string, but i have no idea how. any hints from the gurus?

thank you,

lj

on 2012-02-04 at 00:32 Dennis Raddle wrote:

>You should probably tell us more about your problem because it is very
>likely you are thinking about this problem in a way that is not natural to
>the language.

well, independently of the language, i want to perform a certain task,
that i tried to describe in my previous mail: i have a list of values, and
i need a function that processes the list in some way and outputs a string
of text. this string has to include the name of the list. i prefer to
think about this problem in general terms: i could be processing text to
generate csound scores, or lilypond code, or whatever. apparently, there's
no direct and trivial way to do this in python. i searched quite a lot
before asking on the list, and olivier's answer seems to confirm my
impression.

best,

lj

on 2012-02-03 at 21:01 Olivier Bélanger wrote:

>There is no easy way to retrieve a variable's name as a string. 

i see... 

well, thanks a lot olivier for your example, it was very instructive. but
since it's not easy to retrieve the name of the variable, i think i might
just as well pass two arguments to the function: the list, and a string
with its name. and that's that... not very elegant, but it'll do.

best,

lj

On 04/02/2012 10:57, luis jure wrote:
>
> on 2012-02-03 at 21:01 Olivier Bélanger wrote:
>
>> There is no easy way to retrieve a variable's name as a string.
>
> i see...
>
> well, thanks a lot olivier for your example, it was very instructive. but
> since it's not easy to retrieve the name of the variable, i think i might
> just as well pass two arguments to the function: the list, and a string
> with its name. and that's that... not very elegant, but it'll do.
>

The namespaces problem makes this more than a little tricky (same names 
used in different scopes or namespaces - think of how many places you 
may be using the name 'i'). It is discussed (with proposed solution) here:

http://pythonic.pocoo.org/2009/5/30/finding-objects-names

Which is enough to suggest to me that your solution combining a list 
with its name really is the most elegant option.

Richard Dobson

on 2012-02-04 at 12:28 Richard Dobson wrote:

>Which is enough to suggest to me that your solution combining a list 
>with its name really is the most elegant option.

by now i'm totally convinced of that. mainly because at my newbie stage,
i'm in no condition to even think of anything more sophisticated than
that...

thanks to all that responded! i think it would be a good idea to subscribe
to a python-specific mailing list. i'm having great fun learning the
language, and i'm liking it very much so far. this is the first problem i
encounter where i would have wished for a more direct and elegant solution.

best,


lj

on 2012-02-05 at 12:08 Dennis Raddle wrote:

>As I explained a bit in my other post, actually it *IS* more elegant

yes, i realized that already, it's simpler and more flexible.

thank you dennis, and all of you who took your time to answer my question.

Hello folks,

as a Csounder, I find the streaming phase vocoder opcodes to be an amazing musical tool.
in a conversation with my father, the Hilbert-Huang transform popped up, and I started thinking about the musical implications it might have.
unlike the FFT, HHT "[...] is designed to work well for data that are nonstationary and nonlinear."

http://en.wikipedia.org/wiki/Hilbert%E2%80%93Huang_transform

that line right there clicked something in my brain.
anybody knows of musical applications of the HHT or even of opcodes under developement?

cheers!

Andreas

Well, the Hilbert transform part of this can be performed with 
http://www.csounds.com/manual/html/hilbert.html

Victor
On 5 Feb 2012, at 20:45, andreas russo wrote:

> Hello folks,
> 
> as a Csounder, I find the streaming phase vocoder opcodes to be an amazing musical tool.
> in a conversation with my father, the Hilbert-Huang transform popped up, and I started thinking about the musical implications it might have.
> unlike the FFT, HHT "[...] is designed to work well for data that are nonstationary and nonlinear."
> 
> http://en.wikipedia.org/wiki/Hilbert%E2%80%93Huang_transform
> 
> that line right there clicked something in my brain.
> anybody knows of musical applications of the HHT or even of opcodes under developement?
> 
> cheers!
> 
> Andreas
> 
> Send bugs reports to the Sourceforge bug tracker
>            https://sourceforge.net/tracker/?group_id=81968&atid=564599
> Discussions of bugs and features can be posted here
> To unsubscribe, send email sympa@lists.bath.ac.uk with body "unsubscribe csound"
> 

Dr Victor Lazzarini
Senior Lecturer
Dept. of Music
NUI Maynooth Ireland
tel.: +353 1 708 3545
Victor dot Lazzarini AT nuim dot ie

On first glance, it looks like it would not fit a pvs style 
implementation as it appears not to have an inverse (it is described as 
an adaptive and  "empirically based" algorithm, not as a formula as 
such); it might be more applicable to  a partial-tracking style of 
analysis. I am not competent to follow the maths, but a related issue is 
whether it can be implemented in the pvoc manner of short-time 
overlapping frames. While it is called a transform, which suggests some 
relation to the FFT and HT (etc), it seems really to be a decomposition 
(into amp/freq tracks plus a residual), a different model altogether.


Richard Dobson


On 05/02/2012 20:45, andreas russo wrote:
> Hello folks,
>
> as a Csounder, I find the streaming phase vocoder opcodes to be an amazing musical tool.
> in a conversation with my father, the Hilbert-Huang transform popped up, and I started thinking about the musical implications it might have.
> unlike the FFT, HHT "[...] is designed to work well for data that are nonstationary and nonlinear."
>
> http://en.wikipedia.org/wiki/Hilbert%E2%80%93Huang_transform
>
> that line right there clicked something in my brain.
> anybody knows of musical applications of the HHT or even of opcodes under developement?
>
> cheers!
>
> Andreas
>
> Send bugs reports to the Sourceforge bug tracker
>              https://sourceforge.net/tracker/?group_id=81968&atid=564599
> Discussions of bugs and features can be posted here
> To unsubscribe, send email sympa@lists.bath.ac.uk with body "unsubscribe csound"
>
>