Re: self.set_history error for python custom block

[Marcus Müller]

Python incompatibility can safely be ruled out; you wouldn't get far enough. Please share 
a minimal example of a block that triggers the behaviour.

Best,
Marcus

On 25.09.23 15:49, Ivan Iudice wrote:
> Nobody knows where could be the problem?
> I thought an incompatibility between gnuradio and python versions.
> Regards.
>
> Ivan
>
> > Il giorno 21 set 2023, alle ore 18:13, Ivan Iudice <krono86@tiscali.it> ha 
> > scritto:
> >
> > Dear Jeff,
> > thank you for answer.
> > My code does exactly the same things.
> > Regards.
> >
> > Ivan
> >
> > > Il giorno 21 set 2023, alle ore 17:55, Jeff Long <willcode4@gmail.com> ha 
> > > scritto:
> > >
> > > 
> > > Here is an example (from the QA code) of using history from a Python block.
> > >
> > > https://github.com/gnuradio/gnuradio/blob/5953d3c96b42086c5f8c5f97b6fd7e57717f9aa5/gr-blocks/python/blocks/qa_block_gateway.py#L60
> > >  
> > > <https://github.com/gnuradio/gnuradio/blob/5953d3c96b42086c5f8c5f97b6fd7e57717f9aa5/gr-blocks/python/blocks/qa_block_gateway.py#L60>
> > >
> > > See if your code appears to be doing the same thing.
> > >
> > > On Thu, Sep 21, 2023 at 11:03 AM <krono86@tiscali.it 
> > > <mailto:krono86@tiscali.it>> wrote:
> > >
> > >     __
> > >     Hello List!
> > >     I'm trying to implement a sync block into a OOT module that use previous 
> > > samples of
> > >     the input streams.
> > >     So, I'm using the method set_history in the constructor.
> > >     The problem is that when I use self.set_history(N) I obtain the following 
> > > errors:
> > >
> > >     Generating: 
> > > '/home/userr/workspace/gnuradio-oot/gr-customModule/examples/untitled.py'
> > >
> > >     Executing: /usr/bin/python3 -u
> > >     /home/user/workspace/gnuradio-oot/gr-customModule/examples/untitled.py
> > >
> > >     QSocketNotifier: Can only be used with threads started with QThread
> > >     Traceback (most recent call last):
> > >       File 
> > > "/home/user/workspace/gnuradio-oot/gr-customModule/examples/untitled.py",
> > >     line 291, in <module>
> > >         main()
> > >       File 
> > > "/home/user/workspace/gnuradio-oot/gr-customModule/examples/untitled.py",
> > >     line 269, in main
> > >         tb = top_block_cls()
> > >              ^^^^^^^^^^^^^^^
> > >       File 
> > > "/home/user/workspace/gnuradio-oot/gr-customModule/examples/untitled.py",
> > >     line 179, in __init__
> > >         self.customModule_testBlock_0_0 = customModule.testBlock(1, max_lag, 
> > > lags,
> > >     alpha, win_len, 1, False)
> > >                                          
> > >     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
> > >       File
> > >     
> > > "/usr/local/lib/python3.11/dist-packages/gnuradio/customModule/testBlock.py", 
> > > line
> > >     33, in __init__
> > >         self.set_history(self.max_pos_lag-self.min_neg_lag+1)
> > >         ^^^^^^^^^^^^^^^^
> > >       File "/usr/lib/python3/dist-packages/gnuradio/gr/gateway.py", line 129, in
> > >     __getattr__
> > >         if not hasattr(self, "gateway"):
> > >                ^^^^^^^^^^^^^^^^^^^^^^^^
> > >       File "/usr/lib/python3/dist-packages/gnuradio/gr/gateway.py", line 129, in
> > >     __getattr__
> > >         if not hasattr(self, "gateway"):
> > >                ^^^^^^^^^^^^^^^^^^^^^^^^
> > >       File "/usr/lib/python3/dist-packages/gnuradio/gr/gateway.py", line 129, in
> > >     __getattr__
> > >         if not hasattr(self, "gateway"):
> > >                ^^^^^^^^^^^^^^^^^^^^^^^^
> > >       [Previous line repeated 984 more times]
> > >     RecursionError: maximum recursion depth exceeded
> > >
> > >     >>> Done (return code 1)
> > >
> > >     I'm using GNU Radio 3.10.5.1 (Python 3.11.2) on Debian 12.
> > >     What is going on?
> > >     Thanks in advance!
> > >     Ivan