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POPython C-ext namespace mixed with regular python submodules?
 

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  1. POPython C-ext namespace mixed with regular python submodules?
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    <p>This question has some resemblance with:</p> <p><a href="https://stackoverflow.com/questions/1681281/nested-python-c-extensions-modules">Nested Python C Extensions/Modules?</a></p> <p>Only with a slight twist. Here I'm not trying to mix two C-exts, but one C-ext and a regular python submodule instead.</p> <p>Is there a way for a C-extension to share the module namespace between the symbols "module.so" and those present in a submodule?</p> <p>My module structure looks like this:</p> <pre><code>facs/ facs/ __init__.py setup.py facs.so [*.c files] utils/ __init__.py galaxy.py </code></pre> <p>If I remove "utils" from the hierarchy, I can import facs and see the <code>facs.so</code> methods:</p> <pre><code>&gt;&gt;&gt; import facs &gt;&gt;&gt; dir(facs) ['__doc__', '__file__', '__name__', '__package__', 'build', 'query', 'remove'] </code></pre> <p>But when I put the utils submodule back and try to import the different parts, one namespace seems to mask the other (<code>utils</code> masks the symbols exported by <code>facs.so</code>):</p> <pre><code>&gt;&gt;&gt; import facs &gt;&gt;&gt; dir(facs) ['__builtins__', '__doc__', '__file__', '__name__', '__package__', '__path__'] &gt;&gt;&gt; import facs.utils &gt;&gt;&gt; facs.utils.galaxy.rsync_genomes("phix") Traceback (most recent call last): File "&lt;stdin&gt;", line 1, in &lt;module&gt; AttributeError: 'module' object has no attribute 'galaxy' &gt;&gt;&gt; from facs.utils import galaxy &gt;&gt;&gt; galaxy.rsync_genomes("phix") 'Hello world' </code></pre> <p>As you see, after <code>dir(facs)</code>, <code>build</code>, <code>query</code> and <code>remove</code> are gone and <code>galaxy</code> does not get imported properly unless I do a <code>from facs.utils import galaxy</code> instead of re-using the initial import statement and simply accessing via <code>facs.utils.galaxy.rsync_genomes()</code> directly. </p> <p>To sum up, my intended use of this module would be to do:</p> <pre><code>&gt;&gt;&gt; import facs &gt;&gt;&gt; dir(facs) ['__doc__', '__file__', '__name__', '__package__', 'build', 'query', 'remove' , 'utils'] &lt;--- (Directly accessible from "facs") &gt;&gt;&gt; facs.utils.galaxy.rsync_genomes("phix") 'Hello world' </code></pre> <p>The (currently under development) code is in:</p> <p><a href="https://github.com/brainstorm/facs/tree/develop" rel="nofollow noreferrer">https://github.com/brainstorm/facs/tree/develop</a></p> <p>In case someone wants to try it out by themselves. I'm using virtualenvs and my $PYTHONPATH seems correct:</p> <pre><code>/home/roman/.venvburrito/lib/python: /home/roman/.virtualenvs/py27/lib/python2.7/site-packages </code></pre> <p>And the installation seems to be successful too:</p> <pre><code>cd ~/.virtualenvs/py27/lib/python2.7/site-packages/facs-2.0dev-py2.7.egg/ (py27)$ ls EGG-INFO facs.py facs.pyc facs.so utils/ </code></pre> <p>It seems that no <code>__init__.py</code> file is actually copied to the top level directory but touching it there or not does not affect the importing behavior described above.</p> <p>Any ideas? Thanks in advance!</p>
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    1. CODid you try to rename `facs.so` to something else? Try to use a different name for the package and the `.so`
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    2. COThe `.so` file is generated when the python module is compiled/installed, I don't generate it myself... sorry if that wasn't clear :-S
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