I found the answer to this post in the discuss-gnuradio archive. The answer was posted by Patrick Sathyanathan:

[Discuss-gnuradio] OOT Module Attribute Error module object has no attribute 'blockname' <http://lists.gnu.org/archive/html/discuss-gnuradio/2015-08/msg00374.html>

The problem I had was exactly as Patrick describs, as was the solution.

I'd recommend putting this information on the new Wiki!

Dan Martin

On 3/19/17 10:11 PM, Daniel P. Martin wrote:

I periodically run into problems with the Python/SWIG portion of my out-of-tree module builds. Wrapper modules are built by swig but appear empty.

I'm running Ubuntu 16.04.

The error I get when I try to run a typical flowgraph that uses my "abc_module" from GRC is

Using Volk machine: avx2_64_mmx_orc
AttributeError: 'module' object has no attribute 'periodic_burst_source'

SWIG appears to run and generate the wrapper files during the make, but the wrapper files don't have the interface. I thought I'd fixed this by reinstalling GNU radio, but now a module that once built properly is failing as above. I can run python and "import abc_module" but "Dir(abc_module)" shows it to be empty.

There are multiple SWIG distribution/versions available. At one point I thought switching to SWIG 3.0 fixed this issue but the last time it cropped up switching to 3.0 had no effect.

Also, the "make install" installing wrappers in /usr/local/lib/python2.7/dist-packages, though on another machine I have it has installed wrappers in /usr/lib/python2.7/dist-packages.

Does anyone have tips or advice on debugging these issues?


Dr. Daniel Martin
Acadia Controls, LLC
110 Gateway Commons Dr
Gorham, ME
207 838-6465 mobile
207 839-6303 fax, office

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