Syntax error in Python Fir Filter script

[mike....@gmail.com]

The Gnu Radio firdes plugin syntax appears to have changed. The python script should call .low_pass etc and not _low_pass etc.

Mike D.

[Matthias Brändli]

Hi Mike,

if you can fix it, please send us the updated version. And let us know
for what GNURadio version it is compatible.

mpb

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[mike....@gmail.com]

Currently in Github files:-

taps = digital.filter.firdes_low_pass(gain, sampling_freq, cutoff, transition_width) # hamming window

Working syntax now:-

taps = digital.filter.firdes.low_pass(gain, sampling_freq, cutoff, transition_width) # hamming window

Note that 'low' is preceded by a '.' not a '_'

The GNU Radio version appears to be :-

GNU Radio Manual and C++ API Reference  3.10.9.1

The Free & Open Software Radio Ecosystem

- Using the URL in the commented text but Gnu Radio Companion Help file says 3.10.9.2 (Python 3.12.3)

Which suggested that a full stop was necessary before 'low' so I just tried it and the expected 19 tap file was generated after it had failed with the underscore.

Mike D.

[mike....@gmail.com]

This was the error message with the underscore:-

Traceback (most recent call last):
  File "/home/$(USERNAME)/ODR/ODR-DabMod/doc/fir-filter/./generate-filter.py", line 59, in <module>

    taps = digital.filter.firdes_low_pass(gain, sampling_freq, cutoff, transition_width) # hamming window

           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
AttributeError: module 'gnuradio.filter' has no attribute 'firdes_low_pass'