Re: [Discuss-gnuradio] AttributeError: No constructor defined for tagged_stream_block (Python)

[Sebastian Sahlin]

Hi,

I suppose not - I just figured that using a tagged stream block would be useful since then I'd be able to iterate over the entire packet in one work function call.

Den tis 28 maj 2019 kl 16:22 skrev Müller, Marcus (CEL) <address@hidden>:

But that block doesn't have to be a Tagged Stream Block itself, right?
On Tue, 2019-05-28 at 16:14 +0200, Sebastian Sahlin wrote:
> Hi Marcus,
>
> Aha, that explains it.. bummer! Perhaps you could advise me on an alternative solution to my problem. What I am trying to achieve with the tagged stream block is to apply tags at an interval on a packet; the values are taken from an array that I want to iterate over. However, since the work function has no "memory" I am unsure how to solve iterating over the array.     
>
> Den tis 28 maj 2019 kl 16:04 skrev Müller, Marcus (CEL) <address@hidden>:
> > Hi Sebastian,
> >
> > I must admit that I don't remember whether the TSB block base was
> > correctly wrapped for Python (darn it, first I write something, and
> > then you find a glaring counterexample); in fact, there's not a single
> > test case for that in the main GNU Radio tree, which probably means
> > "no".
> >
> > Best regards,
> > Marcus
> >
> > On Tue, 2019-05-28 at 14:41 +0200, Sebastian Sahlin wrote:
> > > Hi,
> > >
> > > I'm attempting to create a tagged stream block in Python using the following constructor:
> > >
> > > class test_tagged_stream(gr.tagged_stream_block):
> > >     def __init__(self, test_param):
> > >         gr.tagged_stream_block.__init__(self,
> > >             name="test_tagged_stream",
> > >             in_sig=[numpy.complex64],
> > >             out_sig=[numpy.complex64],
> > >             length_tag_key="test_tag")
> > >
> > > However Python is throwing "AttributeError: No constructor defined" at me. Is there some glaringly obvious error in the above code? I am using the input argument list as defined at https://www.gnuradio.org/doc/doxygen/classgr_1_1tagged__stream__block.html#a601cd4073e9c3e6317b5ecc5e2e5871b
> > >
> > > Regards
> > >
> > >
> > >
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