You could use a string channel. Take the running Csound instance and call the relevant
API function from python. In this page there are instructions on how to access the
Csound instance.

http://www.csounds.com/manual/html/pyinit.html


========================
Dr Victor Lazzarini
Dean of Arts, Celtic Studies and Philosophy,
Maynooth University,
Maynooth, Co Kildare, Ireland
Tel: 00 353 7086936
Fax: 00 353 1 7086952 

> On 31 Dec 2015, at 11:11, Alex Weiss  wrote:
> 
> Hello,
> 
> I'm running into a problem with some of the python opcodes. Specifically, I have a python function that saves its return value into a python string. I then want to assign that string to a S-variable in csound. But it appears that none of the pyeval* opcodes can handle strings, only kvars. Any suggestions?
> 
> Maybe there's also a way to bypass python altogether. All I'm trying to do is to pick a random filename from a directory.
> 
> Thanks,
> Alex
> Csound mailing list Csound@listserv.heanet.ie https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND Send bugs reports to https://github.com/csound/csound/issues Discussions of bugs and features can be posted here

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Try using

c.csoundSetStringChannel()

regards
========================
Dr Victor Lazzarini
Dean of Arts, Celtic Studies and Philosophy,
Maynooth University,
Maynooth, Co Kildare, Ireland
Tel: 00 353 7086936
Fax: 00 353 1 7086952 

> On 31 Dec 2015, at 18:02, Alex Weiss  wrote:
> 
> Thanks Victor. Getting closer, but I'm getting an error now. Here's the python code: 
> 
> pyruni {{
> import os, random, csnd6
> filename = random.choice(os.listdir("."))
> c = csnd6.csoundGetInstance(_CSOUND_)
> c.SetChannel("filename", filename)
> }}
> 
> The error message I'm getting is "AttributeError: 'SwigPyObject' object has no attribute 'SetChannel'". Any suggestions?
> 
> Thanks,
> Alex
> 
> On Thu, Dec 31, 2015 at 4:34 PM Victor Lazzarini  wrote:
> You could use a string channel. Take the running Csound instance and call the relevant
> API function from python. In this page there are instructions on how to access the
> Csound instance.
> 
> http://www.csounds.com/manual/html/pyinit.html
> 
> 
> ========================
> Dr Victor Lazzarini
> Dean of Arts, Celtic Studies and Philosophy,
> Maynooth University,
> Maynooth, Co Kildare, Ireland
> Tel: 00 353 7086936
> Fax: 00 353 1 7086952
> 
> > On 31 Dec 2015, at 11:11, Alex Weiss  wrote:
> >
> > Hello,
> >
> > I'm running into a problem with some of the python opcodes. Specifically, I have a python function that saves its return value into a python string. I then want to assign that string to a S-variable in csound. But it appears that none of the pyeval* opcodes can handle strings, only kvars. Any suggestions?
> >
> > Maybe there's also a way to bypass python altogether. All I'm trying to do is to pick a random filename from a directory.
> >
> > Thanks,
> > Alex
> > Csound mailing list Csound@listserv.heanet.ie https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND Send bugs reports to https://github.com/csound/csound/issues Discussions of bugs and features can be posted here
> 
> Csound mailing list
> Csound@listserv.heanet.ie
> https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND
> Send bugs reports to
>         https://github.com/csound/csound/issues
> Discussions of bugs and features can be posted here
> Csound mailing list Csound@listserv.heanet.ie https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND Send bugs reports to https://github.com/csound/csound/issues Discussions of bugs and features can be posted here

Csound mailing list
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Send bugs reports to
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Sorry, I should have said

 csnd6.csoundSetStringChannel(c, "filename", filename)

That’ll work.
========================
Dr Victor Lazzarini
Dean of Arts, Celtic Studies and Philosophy,
Maynooth University,
Maynooth, Co Kildare, Ireland
Tel: 00 353 7086936
Fax: 00 353 1 7086952 

> On 31 Dec 2015, at 19:00, Alex Weiss  wrote:
> 
> Already tried that to no avail, unfortunately.
> 
> Alex
> 
> On Thu, Dec 31, 2015 at 7:15 PM Victor Lazzarini  wrote:
> Try using
> 
> c.csoundSetStringChannel()
> 
> regards
> ========================
> Dr Victor Lazzarini
> Dean of Arts, Celtic Studies and Philosophy,
> Maynooth University,
> Maynooth, Co Kildare, Ireland
> Tel: 00 353 7086936
> Fax: 00 353 1 7086952
> 
> > On 31 Dec 2015, at 18:02, Alex Weiss  wrote:
> >
> > Thanks Victor. Getting closer, but I'm getting an error now. Here's the python code:
> >
> > pyruni {{
> > import os, random, csnd6
> > filename = random.choice(os.listdir("."))
> > c = csnd6.csoundGetInstance(_CSOUND_)
> > c.SetChannel("filename", filename)
> > }}
> >
> > The error message I'm getting is "AttributeError: 'SwigPyObject' object has no attribute 'SetChannel'". Any suggestions?
> >
> > Thanks,
> > Alex
> >
> > On Thu, Dec 31, 2015 at 4:34 PM Victor Lazzarini  wrote:
> > You could use a string channel. Take the running Csound instance and call the relevant
> > API function from python. In this page there are instructions on how to access the
> > Csound instance.
> >
> > http://www.csounds.com/manual/html/pyinit.html
> >
> >
> > ========================
> > Dr Victor Lazzarini
> > Dean of Arts, Celtic Studies and Philosophy,
> > Maynooth University,
> > Maynooth, Co Kildare, Ireland
> > Tel: 00 353 7086936
> > Fax: 00 353 1 7086952
> >
> > > On 31 Dec 2015, at 11:11, Alex Weiss  wrote:
> > >
> > > Hello,
> > >
> > > I'm running into a problem with some of the python opcodes. Specifically, I have a python function that saves its return value into a python string. I then want to assign that string to a S-variable in csound. But it appears that none of the pyeval* opcodes can handle strings, only kvars. Any suggestions?
> > >
> > > Maybe there's also a way to bypass python altogether. All I'm trying to do is to pick a random filename from a directory.
> > >
> > > Thanks,
> > > Alex
> > > Csound mailing list Csound@listserv.heanet.ie https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND Send bugs reports to https://github.com/csound/csound/issues Discussions of bugs and features can be posted here
> >
> > Csound mailing list
> > Csound@listserv.heanet.ie
> > https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND
> > Send bugs reports to
> >         https://github.com/csound/csound/issues
> > Discussions of bugs and features can be posted here
> > Csound mailing list Csound@listserv.heanet.ie https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND Send bugs reports to https://github.com/csound/csound/issues Discussions of bugs and features can be posted here
> 
> Csound mailing list
> Csound@listserv.heanet.ie
> https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND
> Send bugs reports to
>         https://github.com/csound/csound/issues
> Discussions of bugs and features can be posted here
> Csound mailing list Csound@listserv.heanet.ie https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND Send bugs reports to https://github.com/csound/csound/issues Discussions of bugs and features can be posted here

Csound mailing list
Csound@listserv.heanet.ie
https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND
Send bugs reports to
        https://github.com/csound/csound/issues
Discussions of bugs and features can be posted here

In case you are looking to load random samples from a directory as Hlöðver suggested, you can try the attached opcode. Place it into your Csound build Opcodes folder and add make_plugin(ftsamplebank ftsamplebank.cpp) to the CMakeLists.txt in that same folder. Then run make in your build dir and away you go. Just pass it a directory, and it will automatically load all sound files into corresponding function tables. Below is a simple example of it in use.

;ftsamplebank will load all samples in a given directory into function
;tables, and return the number of table created
;iNumberOfFile ftsamplebank SDirectory, iTrigger, iFirstTableNumber,
;iSkipTime, iFormat, iChannel,

instr 1000
   iFirstTableNumber = 60;
   iTrig = 1
   i1 ftsamplebank "/home/rory/NiMPTi/Drums1", iTrig, iFirstTableNumber, 0, 4, 1
endin

On 31 December 2015 at 19:19, Victor Lazzarini <Victor.Lazzarini@nuim.ie> wrote:

Sorry, I should have said

 csnd6.csoundSetStringChannel(c, "filename", filename)

That’ll work.
========================
Dr Victor Lazzarini
Dean of Arts, Celtic Studies and Philosophy,
Maynooth University,
Maynooth, Co Kildare, Ireland
Tel: 00 353 7086936
Fax: 00 353 1 7086952

> On 31 Dec 2015, at 19:00, Alex Weiss <alexweiss86@gmail.com> wrote:
>
> Already tried that to no avail, unfortunately.
>
> Alex
>
> On Thu, Dec 31, 2015 at 7:15 PM Victor Lazzarini <Victor.Lazzarini@nuim.ie> wrote:
> Try using
>
> c.csoundSetStringChannel()
>
> regards
> ========================
> Dr Victor Lazzarini
> Dean of Arts, Celtic Studies and Philosophy,
> Maynooth University,
> Maynooth, Co Kildare, Ireland
> Tel: 00 353 7086936
> Fax: 00 353 1 7086952
>
> > On 31 Dec 2015, at 18:02, Alex Weiss <alexweiss86@gmail.com> wrote:
> >
> > Thanks Victor. Getting closer, but I'm getting an error now. Here's the python code:
> >
> > pyruni {{
> > import os, random, csnd6
> > filename = random.choice(os.listdir("."))
> > c = csnd6.csoundGetInstance(_CSOUND_)
> > c.SetChannel("filename", filename)
> > }}
> >
> > The error message I'm getting is "AttributeError: 'SwigPyObject' object has no attribute 'SetChannel'". Any suggestions?
> >
> > Thanks,
> > Alex
> >
> > On Thu, Dec 31, 2015 at 4:34 PM Victor Lazzarini <Victor.Lazzarini@nuim.ie> wrote:
> > You could use a string channel. Take the running Csound instance and call the relevant
> > API function from python. In this page there are instructions on how to access the
> > Csound instance.
> >
> > http://www.csounds.com/manual/html/pyinit.html
> >
> >
> > ========================
> > Dr Victor Lazzarini
> > Dean of Arts, Celtic Studies and Philosophy,
> > Maynooth University,
> > Maynooth, Co Kildare, Ireland
> > Tel: 00 353 7086936
> > Fax: 00 353 1 7086952
> >
> > > On 31 Dec 2015, at 11:11, Alex Weiss <alexweiss86@gmail.com> wrote:
> > >
> > > Hello,
> > >
> > > I'm running into a problem with some of the python opcodes. Specifically, I have a python function that saves its return value into a python string. I then want to assign that string to a S-variable in csound. But it appears that none of the pyeval* opcodes can handle strings, only kvars. Any suggestions?
> > >
> > > Maybe there's also a way to bypass python altogether. All I'm trying to do is to pick a random filename from a directory.
> > >
> > > Thanks,
> > > Alex
> > > Csound mailing list Csound@listserv.heanet.ie https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND Send bugs reports to https://github.com/csound/csound/issues Discussions of bugs and features can be posted here
> >
> > Csound mailing list
> > Csound@listserv.heanet.ie
> > https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND
> > Send bugs reports to
> >         https://github.com/csound/csound/issues
> > Discussions of bugs and features can be posted here
> > Csound mailing list Csound@listserv.heanet.ie https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND Send bugs reports to https://github.com/csound/csound/issues Discussions of bugs and features can be posted here
>
> Csound mailing list
> Csound@listserv.heanet.ie
> https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND
> Send bugs reports to
>         https://github.com/csound/csound/issues
> Discussions of bugs and features can be posted here
> Csound mailing list Csound@listserv.heanet.ie https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND Send bugs reports to https://github.com/csound/csound/issues Discussions of bugs and features can be posted here

Csound mailing list
Csound@listserv.heanet.ie
https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND
Send bugs reports to
        https://github.com/csound/csound/issues
Discussions of bugs and features can be posted here

Csound mailing list Csound@listserv.heanet.ie https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND Send bugs reports to https://github.com/csound/csound/issues Discussions of bugs and features can be posted here

<ftsamplebank.cpp>

done. 
========================
Dr Victor Lazzarini
Dean of Arts, Celtic Studies and Philosophy,
Maynooth University,
Maynooth, Co Kildare, Ireland
Tel: 00 353 7086936
Fax: 00 353 1 7086952 

> On 1 Jan 2016, at 12:02, Rory Walsh  wrote:
> 
> Feel free to drop it in. I will write a manual page. 
> 
> On 1 January 2016 at 11:57, Victor Lazzarini  wrote:
> Is there any reason for this not to be included in the Csound sources? 
> 
> Victor Lazzarini
> Dean of Arts, Celtic Studies, and Philosophy
> Maynooth University
> Ireland
> 
> On 1 Jan 2016, at 09:10, Rory Walsh  wrote:
> 
>> In case you are looking to load random samples from a directory as Hlöðver suggested, you can try the attached opcode. Place it into your Csound build Opcodes folder and add make_plugin(ftsamplebank ftsamplebank.cpp) to the CMakeLists.txt in that same folder. Then run make in your build dir and away you go. Just pass it a directory, and it will automatically load all sound files into corresponding function tables. Below is a simple example of it in use. 
>> 
>> ;ftsamplebank will load all samples in a given directory into function 
>> ;tables, and return the number of table created 
>> ;iNumberOfFile ftsamplebank SDirectory, iTrigger, iFirstTableNumber, 
>> ;iSkipTime, iFormat, iChannel, 
>> 
>> instr 1000 
>>    iFirstTableNumber = 60; 
>>    iTrig = 1 
>>    i1 ftsamplebank "/home/rory/NiMPTi/Drums1", iTrig, iFirstTableNumber, 0, 4, 1 
>> endin 
>> 
>> On 31 December 2015 at 19:19, Victor Lazzarini  wrote:
>> Sorry, I should have said
>> 
>>  csnd6.csoundSetStringChannel(c, "filename", filename)
>> 
>> That’ll work.
>> ========================
>> Dr Victor Lazzarini
>> Dean of Arts, Celtic Studies and Philosophy,
>> Maynooth University,
>> Maynooth, Co Kildare, Ireland
>> Tel: 00 353 7086936
>> Fax: 00 353 1 7086952
>> 
>> > On 31 Dec 2015, at 19:00, Alex Weiss  wrote:
>> >
>> > Already tried that to no avail, unfortunately.
>> >
>> > Alex
>> >
>> > On Thu, Dec 31, 2015 at 7:15 PM Victor Lazzarini  wrote:
>> > Try using
>> >
>> > c.csoundSetStringChannel()
>> >
>> > regards
>> > ========================
>> > Dr Victor Lazzarini
>> > Dean of Arts, Celtic Studies and Philosophy,
>> > Maynooth University,
>> > Maynooth, Co Kildare, Ireland
>> > Tel: 00 353 7086936
>> > Fax: 00 353 1 7086952
>> >
>> > > On 31 Dec 2015, at 18:02, Alex Weiss  wrote:
>> > >
>> > > Thanks Victor. Getting closer, but I'm getting an error now. Here's the python code:
>> > >
>> > > pyruni {{
>> > > import os, random, csnd6
>> > > filename = random.choice(os.listdir("."))
>> > > c = csnd6.csoundGetInstance(_CSOUND_)
>> > > c.SetChannel("filename", filename)
>> > > }}
>> > >
>> > > The error message I'm getting is "AttributeError: 'SwigPyObject' object has no attribute 'SetChannel'". Any suggestions?
>> > >
>> > > Thanks,
>> > > Alex
>> > >
>> > > On Thu, Dec 31, 2015 at 4:34 PM Victor Lazzarini  wrote:
>> > > You could use a string channel. Take the running Csound instance and call the relevant
>> > > API function from python. In this page there are instructions on how to access the
>> > > Csound instance.
>> > >
>> > > http://www.csounds.com/manual/html/pyinit.html
>> > >
>> > >
>> > > ========================
>> > > Dr Victor Lazzarini
>> > > Dean of Arts, Celtic Studies and Philosophy,
>> > > Maynooth University,
>> > > Maynooth, Co Kildare, Ireland
>> > > Tel: 00 353 7086936
>> > > Fax: 00 353 1 7086952
>> > >
>> > > > On 31 Dec 2015, at 11:11, Alex Weiss  wrote:
>> > > >
>> > > > Hello,
>> > > >
>> > > > I'm running into a problem with some of the python opcodes. Specifically, I have a python function that saves its return value into a python string. I then want to assign that string to a S-variable in csound. But it appears that none of the pyeval* opcodes can handle strings, only kvars. Any suggestions?
>> > > >
>> > > > Maybe there's also a way to bypass python altogether. All I'm trying to do is to pick a random filename from a directory.
>> > > >
>> > > > Thanks,
>> > > > Alex
>> > > > Csound mailing list Csound@listserv.heanet.ie https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND Send bugs reports to https://github.com/csound/csound/issues Discussions of bugs and features can be posted here
>> > >
>> > > Csound mailing list
>> > > Csound@listserv.heanet.ie
>> > > https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND
>> > > Send bugs reports to
>> > >         https://github.com/csound/csound/issues
>> > > Discussions of bugs and features can be posted here
>> > > Csound mailing list Csound@listserv.heanet.ie https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND Send bugs reports to https://github.com/csound/csound/issues Discussions of bugs and features can be posted here
>> >
>> > Csound mailing list
>> > Csound@listserv.heanet.ie
>> > https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND
>> > Send bugs reports to
>> >         https://github.com/csound/csound/issues
>> > Discussions of bugs and features can be posted here
>> > Csound mailing list Csound@listserv.heanet.ie https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND Send bugs reports to https://github.com/csound/csound/issues Discussions of bugs and features can be posted here
>> 
>> Csound mailing list
>> Csound@listserv.heanet.ie
>> https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND
>> Send bugs reports to
>>         https://github.com/csound/csound/issues
>> Discussions of bugs and features can be posted here
>> 
>> Csound mailing list Csound@listserv.heanet.ie https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND Send bugs reports to https://github.com/csound/csound/issues Discussions of bugs and features can be posted here
>> 
> Csound mailing list Csound@listserv.heanet.ie https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND Send bugs reports to https://github.com/csound/csound/issues Discussions of bugs and features can be posted here
> 
> Csound mailing list Csound@listserv.heanet.ie https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND Send bugs reports to https://github.com/csound/csound/issues Discussions of bugs and features can be posted here

Csound mailing list
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Send bugs reports to
        https://github.com/csound/csound/issues
Discussions of bugs and features can be posted here

hi -

i see it's already solved.  just to note a csound-internal solution:  if 
you have your filename in a string like 
"/my/file/one.wav|/my/file/two.wav|/my/file/three.wav|/my/file/four.wav"[1], 
then you can use the udo StrToArr [2] to convert to an array of strings, 
and then (as hlödver mentioned) easily get one filename or path by a 
random opcode:

seed 0
instr 1
  S_InStr = 
"/my/file/one.wav|/my/file/two.wav|/my/file/three.wav|/my/file/four.wav"
  S_arr[], iLen StrToArr S_InStr, "|"
  S_rand = S_arr[random:i(0, iLen+.999)]
  puts S_rand, 1
endin

	joachim


[1] the seperator can be anything, including space
[2] 
https://github.com/csudo/csudo/blob/master/strings/conversion/StrToArr.csd


On 31/12/15 12:11, Alex Weiss wrote:
> Hello,
>
> I'm running into a problem with some of the python opcodes.
> Specifically, I have a python function that saves its return value into
> a python string. I then want to assign that string to a S-variable in
> csound. But it appears that none of the pyeval* opcodes can handle
> strings, only kvars. Any suggestions?
>
> Maybe there's also a way to bypass python altogether. All I'm trying to
> do is to pick a random filename from a directory.
>
> Thanks,
> Alex
> Csound mailing list Csound@listserv.heanet.ie
> 
> https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND Send bugs reports to
> https://github.com/csound/csound/issues Discussions of bugs and features
> can be posted here

Csound mailing list
Csound@listserv.heanet.ie
https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND
Send bugs reports to
        https://github.com/csound/csound/issues
Discussions of bugs and features can be posted here