Re: Problem with the OOT forecast() method in Python

The last one looks correct, and would not have given the error you mention above. What happened?

On Wed, Oct 12, 2022 at 4:49 PM George Edwards <gedwards.eng@gmail.com> wrote:

Hi Jeff, thank you very much for the response. 

I tries:

ninput_items_required[0]=[noutput_items]

ninput_items_required=[noutput_items]

and

return [noutput_items]

None of these worked for me.

Regards 

George

On Wed, Oct 12, 2022, 8:07 AM Jeff Long <willcode4@gmail.com> wrote:

For Python, the forecast() function should return a list, containing the number of items required for each input.

On Wed, Oct 12, 2022 at 8:08 AM George Edwards <gedwards.eng@gmail.com> wrote:

Hello GNURadio Community, 

I am getting a TypeError when I fill in the code in the forecast() method in my Gnuradio OOT block design. I know, if I want to interpolate or decimate, I can simply pick the block type in the gr_modtool design menu, however, I would like to develop the capability to design my own. Here is how I fill in the forecast() method in Python to do either decimation or interpolation:

ninput_items_required[0] = noutput_items*self.sps  # for decimation

OR

ninput_items_required[0] = noutput_items/self.sps  # for interpolation

On running the flowgraph in GRC Console I see TypeError: 'int' object does not support item assignment.

Will appreciate any suggestion to fix this problem.

George