Re: [Discuss-gnuradio] "ImportError: No module named myblock" when generating py file in GRC

[Nick Foster]

On Thu, 2011-04-21 at 08:37 +0800, Yulong Yang wrote:
> Hello,
> 
> I have tried both python -c "import..." and echo $. I see the path to my
> folder in both of them. But it still says ImportError in top_block.py.
> Where exactly should the path direct to? I tried both "~/gnuradio" and
> "~/gnuradio/myblock".
> 
> When you say __init__.py do you mean the one in sub-folder "python"? I
> find this comment in that file: # The presence of this file turns this
> directory into a Python package.
> 
> I am wondering where I could see the declare of my module.

How did you create your project? Did you use
"create-gnuradio-out-of-tree-project myblock"? If you did, you should be
able to:

cd myblock
./bootstrap
./configure
make
sudo make install

and then
python -c "import myblock"

Otherwise, you're going to have to go into the howto-write-a-block
directory which you cloned, and edit the SWIG stuff to change all the
"howto" references to "myblock", and that is going to be a pain. Try
re-creating your project using create-gnuradio-out-of-tree-project, it's
the recommended way to start your own block project.

--n

> 
> To Mike: yes, I am in Ubuntu 10.04
> 
> Many thanks to your help.
> 
> On Wed, 2011-04-20 at 16:43 -0700, Josh Blum wrote:
> > 
> > On 04/20/2011 04:42 PM, yulong yang wrote:
> > > On Thu, Apr 21, 2011 at 7:17 AM, Josh Blum <address@hidden> wrote:
> > > 
> > >>
> > >>
> > >> On 04/20/2011 03:00 AM, Yulong Yang wrote:
> > >>> Hello,
> > >>>
> > >>> I am new to GNU radio. I am trying to write a simple block and add it to
> > >>> GRC. All steps before are fine. However, when I generate the
> > >>> top_block.py file, it says "ImportError: No module named myblock".
> > >>>
> > >>> The myblock is actually the name of the folder I create to put all
> > >>> necessary files of my block such as files like MakeFile.am and
> > >>> sub-folders lib, swig, etc. Can this be called a module?
> > >>>
> > >>
> > >> In the case of python, a module is a python file or a directory w/ a
> > >> python file __init__.py
> > >>
> > > 
> > > Thank your for your reply.
> > > 
> > > So for example, the how-to--write-a-block folder stands for a module 
> > > called
> > > "howto", right? Is the name of the module defined in the py file?
> > > 
> > >>
> > >>> What is a module? I see the code in how-to-write-a-block, it seems that
> > >>> it also import a module howto. Where could I find such modules or create
> > >>> one my own?
> > >>>
> > >>> Sorry to ask so many questions; I cannot find a clear way to study this.
> > >>> I would really appreciate any help.
> > >>>
> > >>> Thank you in advance.
> > >>>
> > >>>
> > >>
> > >> Python needs to be able to find your block: Did you install it into the
> > >> python search path? Or set PYTHONPATH to where your block is installed?
> > >>
> > >>
> > > Do your mean PYTHONPATH or just system search path?
> > > I have set my block path as the PYTHONPATH in ~/.profile, but it still
> > > cannot work. Is there a way to check whether the path is set 
> > > appropriately?
> > > 
> > 
> > try .bashrc
> > 
> > also
> > 
> > python -c "import sys; print sys.path"
> > 
> > > 
> > >> -josh
> > >>
> > >> _______________________________________________
> > >> Discuss-gnuradio mailing list
> > >> address@hidden
> > >> https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
> > >>
> > > 
> 
> 
> 
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