usage of gr.decim_block with python

Hello all,

i am struggling a bit with gr.decim_block.

I think its possible to call e.g. self.set_decimation(decim).

But whatever i do, GRC and python tells me:

AttributeError: 'blk' object has no attribute 'decimation'
(in case i try self.decimation())

I am a little bit lost and need guidance.

(under Windows 10 with gr 3.8 – a big thank you to Geof Nieboer!!!!)

Vy73
Harald
DD0VS