thanks frieds for direction.
I did a patch . with pyext. and it works !
it does what i want:
BUT
I cant have a trigger (bang) from that. it i strange. Even if my pyext object fills nbx with numbers, it won't give a bang. I think it is a bug.
my situation is:
[nbx] - with changing number of mails from pyext object (works ok) | | bang -> BUT this bang never works. It is bug. or ?
[archinux, pdextended 43.5]