nsound does not work with swig3, ubuntu 16

[weegreenblobbie]

I'm having all kinds of problems on ubuntu 16 out of the box:

Ubuntu 16 default swig package is 3.X, which doesn't seem to work with nsound 0.9.4. After building and installing the python package with swig3, I get strange errors, as simple trying to construct a Sine generator:

import Nsound as ns
g = ns.Sine(44100)
#...
AttributeError: type object 'object' has no attribute '__getattr__'

Nsound partially works after installing the swig2.0 package:

sudo apt-get install swig2.0

Running unit tests from the git clone works as expeted:

python -m unittest discover
.....................................
----------------------------------------------------------------------
Ran 37 tests in 2.971s

OK

However trying to run one of the examples hangs in what appears to be an infinite loop:

cd src/examples
python example1.py
# no output, just hangs

Please fix for Ubuntu 16!

Hello, wegreenblobbie.

I'm having the same issue in Fedora 24. Is there any solution at this moment besides downgrading swig?
Cheers

[weegreenblobbie]

I haven't looked into this, I could take a look this weekend.

That would be awesome!

[weegreenblobbie]

Partial success. It turns out that swig 3.08 (the packaged version in ubuntu 16.04) is buggy.

I manually installed swig 3.0.12, some things are working, unit tests are passing (I don't have much coverage), but some of the examples still hang.

I searched similar errors online and swig does seem buggy. I think this is useful:
swig/swig#553

[weegreenblobbie]

Yeah, I saw that too, but the -modern doesn't seem to have any impact with swig 3.0.12.

[weegreenblobbie]

098411d

[weegreenblobbie]

work in progress ...

[weegreenblobbie]

@respinha try out the branch "bugfix/issue5", you will need swig 3.0.12, let me know if it works for you.

My long term plan is to completely rewrite Nsound in c++14, the existing code base is very old and difficult to maintain. SWIG is also very painful, I may look into alternatives like cython, boost::python, or pybind11.

:)

@weegreenblobbie I removed the previously generated python files with a 'pip uninstall' and then tried the new branch and still doesn't work when I create a Sine.

PS: indeed, swig seems troublesome.

[weegreenblobbie]

How did you install? You can check what version is installed by looking at Nsound.__version__. Make sure it reports 0.9.5.dev1.

You can also try to see if the unittests run with: scons --pytest

I installed as you suggest in the INSTALL file, running scons and then sudo python setup.py install.
I also tried running unittests and they all fail with the same error.

PS: yes, my version is 0.9.5.dev1

[weegreenblobbie]

Perhaps there is another issue, can you paste in the error. I'll try to run Fedora 24 in a VM to see if I can duplicate the error you're seeing.

@weegreenblobbie it's the same error in all tests. Whenever an object of any type is created, it always crashes with this stacktrace:

File ".local/lib/python2.7/site-packages/Nsound-0.9.5.dev1-py2.7-linux-x86_64.egg/Nsound.py", line 7522, in __init__
    self.this.append(this)
  File ".local/lib/python2.7/site-packages/Nsound-0.9.5.dev1-py2.7-linux-x86_64.egg/Nsound.py", line 7515, in <lambda>
    __getattr__ = lambda self, name: _swig_getattr(self, Sine, name)
  File ".local/lib/python2.7/site-packages/Nsound-0.9.5.dev1-py2.7-linux-x86_64.egg/Nsound.py", line 74, in _swig_getattr
    return _swig_getattr_nondynamic(self, class_type, name, 0)
  File ".local/lib/python2.7/site-packages/Nsound-0.9.5.dev1-py2.7-linux-x86_64.egg/Nsound.py", line 69, in _swig_getattr_nondynamic
    return object.__getattr__(self, name)