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

[Jeff Long]

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