Re: self.set_history error for python custom block

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

See if your code appears to be doing the same thing.

On Thu, Sep 21, 2023 at 11:03 AM <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