Hi,

I am using a python script to open Pd files on a Raspberry Pi. I am having an issue because I using shell commands to open Pure Data and when I want to open a new patch it always opens a new instance of Pd. Is there any way to have Pd only run in one instance? Is there a message I can give it? or a flag or something?

EDIT: here's a better way of asking my question. Is there a shell command I can use to open a .pd file in an already open instance of Pure Data? That's really what's hanging me up.

Thank you in advance for any help.

Nick

@nicnut The receiver in Pd will be the easy part.
Have you got anywhere with the Python code yet?
David.

@nicnut thats pretty weird, im doing the same and its almost instantaneous, do you aconnect by name or port nr? alternatively what you could do is merge your patches into one big patch with pd~ instances and turn parts of the patch on and off remotely to save cpu, or you dig into the undocumented pd msgs, im sure there is a way to tell pd to close a patch and load another one

@nicnut What an absolute on my rpi with x11vnc under Stretch. Was fine in Jessie.
Anyway........ like........ this.zip ...... will ......work... from Python.....
David.

Holy Cow! @whale-av this totally worked! thank you.

I assumed pdsend just came with the installation of Pd, but it wasn't there. I put it in the bin.

Also, for the record I am also using Stretch and Pd .49.

Anyway this is really great and I can format my message from here.

@francis666 I know it is weird that it takes 30 seconds. This 30 secs includes opening Pd and my patch, then 30 seconds later the aconnect line runs in the terminal. I tried 10 seconds, 20 seconds, but those didn't work. I wish Pd could automatically see the midi controller, but that's not happening.

Hi everyone. I'm still grappling with this issue, but I feel like I'm getting close. I can send my file name and file path from python into Pd. it took forever to figure out.

But I am having an issue formatting my message to open the file from within Pd. If you look at the patch I uploaded, on the right, if I manually type in my file name and path and pack them together into a message and send it to Pd the file will open. But when I send it from Python using netreceive objects it will not open. I printed out what is coming out of pack and it says "open beat_three.9.pd symbol" instead of "open beat_three.9.pd /media/pi/PYRAMIDI/pd_patches/aa_beat_three".

At first I thought that long file path can't go through the pack object, but it goes through it fine on the example on the right of the patch. It just seems that if I send this info in from a netreceive object it's not really working.

Any suggestions?

thanks, Nick

open_from_python.pd

@nicnut Almost certainly the order of operations...... patch.pd
The [pack] must have its $2 already when it receives its $1 and bangs through [$1 $2( ...... otherwise it will just bang through [$1 nothing(
David.

patch2.pd

@whale-av I thought it was the order of operations too, I did some tests with extreme delays and that didn't work.

For some reason i had to add another list2symbol object before the path gets to the pack object. it's interesting because the file name didn't need a list2symbol, but I added it just for consistency and to be safe.

Anyway now this all works, I can open my patches from python within Pd. This is really huge for me so thank you forum and especially @whale-av for all your help!

Purr Data automatically routes the patch to the currently open instance (if there is one).

@jancsika Ok thanks. I need to spend some time with Purr Data. I have in installed, but haven't investigated in enough yet. Anyway, It seems I have this issue figured out.

thanks, Nick