?????? the out_items of python block?

[????????]

Hi Marcus,

Do you mean that I only performed assignment operations on out_items[0][1] to out_items[0][9], and I did not perform any operations on other out_items[0][i], and then reported to GNURadio? ?

I observed the performance of "QT GUI Time sink", which is a graph resembling a rectangular signal, which seems understandable because I assigned a value of 0.5 to out_items[0][1] to out_items[0][9]. As time goes by, the rectangular signal moves to the right. If you look more closely, the width of the rectangular signal has actually changed! I really don't understand.

Please forgive me for being stupid, but hope someone can help me explain it in detail.

Sincerely

Liu Maolin

------------------ ???????? ------------------

??????: "Marcus M??ller" <mmueller@gnuradio.org>;

????????: 2021??6??23??(??????) ????8:26

??????: "discuss-gnuradio"<discuss-gnuradio@gnu.org>;

????: Re: the out_items of python block?

Hi liumaolin,

>     def work(self, input_items, output_items):
>         """example: multiply with constant"""
>         for i in range(10) :

You can't do that: you need to make sure you've got at least 10 output items to fill!

>        return len(output_items[0])

Here you tell GNU Radio that you produced `len(output_items[0])` items, where in reality
you produced 10, which might (and will) be less or more than `len(output_items[0])`!

Best regards,
Marcus