Cannot Import GNURadio Error With Ettus deb Package and Ubuntu 12.04

GNU Radio
1

Hello,
I installed GNURadio using the deb package Ettus distributes
herehttp://files.ettus.com/binaries/gnuradio/latest_stable/.
I’m using Ubuntu 12.04 64 bit. The install seems to work properly but
when
I try to open GNURadio companion I get a Cannot import GNURadio error.
Thishttp://gnuradio.org/redmine/projects/gnuradio/wiki/UbuntuInstallpage
says to add “export
PYTHONPATH=$PYTHONPATH:/opt/gnuradio/lib/python2.6/site-packages” to my
bashrc. However, opt is empty and I believe the relevant files have been
installed to /usr/lib/python2.7/dist-packages as there is a gnuradio
folder
there. I have added “export
PYTHONPATH=$PYTHONPATH:/usr/local/lib/python2.6/dist-packages” to my
bashrc. However, when I run $PYTHONPATH in a new terminal I get “bash:
:/usr/local/lib/python2.6/dist-packages: No such file or directory” and
grc
gives the same cannot import GNURadio error. I used nano to edit the
bashrc. Does anyone know what I’m doing wrong? Thanks ahead of time!

-Dan

2

The gnuradio.org page you linked to describes how to install GNU Radio
from source, which, by default, installs to /usr/local. /opt is given as
an example for another occasionally used install prefix.

Our installers install to /usr, so the relevant Python files would
indeed be installed to /usr/lib/python2.7/dist-packages, as you
observed.

Setting the PYTHONPATH to use /usr/local/lib/python2.6/dist-packages
will make it look for files that don’t exist, thus the “No such file or
directory” error.

Remove the /usr/local path from .bashrc, and the “No such file or
directory” error should disappear. Assuming you don’t have any local
installs, GRC should then look at /usr/lib.

3

Dan,
typing $PYTHONPATH at the command line will give an error, bash is
trying to
execute it. use:

echo $PYTHONPATH instead.

Ubuntu 12.04 is using: /usr/local/lib/python2.7/dist-packages instead of
python2.6

73s
jim

On Monday, June 25, 2012 10:37:46 AM Daniel Labarowski wrote:

Hello,
I installed GNURadio using the deb package Ettus distributes here. I’m
using
Ubuntu 12.04 64 bit. The install seems to work properly but when I try
to open
GNURadio companion I get a Cannot import GNURadio error. This page says
to add
“export
PYTHONPATH=$PYTHONPATH:/opt/gnuradio/lib/python2.6/site-packages” to
my bashrc. However, opt is empty and I believe the relevant files have
been
installed to /usr/lib/python2.7/dist-packages as there is a gnuradio
folder
there. I have added “export
PYTHONPATH=$PYTHONPATH:/usr/local/lib/python2.6/dist-packages” to my
bashrc.
However, when I run $PYTHONPATH in a new terminal I get “bash:
:/usr/local/lib/python2.6/dist-packages: No such file or directory” and
grc
gives the same cannot import GNURadio error. I used nano to edit the
bashrc.
Does anyone know what I’m doing wrong? Thanks ahead of time!

-Dan

4

Daniel, while it’s also the case that you are referring to a different
version of Python, our installers install to
/usr/lib/python2.7/dist-packages instead of /usr/local.

5

Thanks jim. Not sure how I didn’t realize that. Seems all to obvious
now.

Nicholas, you were right about python 2.7. I made a type and put 2.6.
However, I’m still getting the same error from grc. Perhaps the
LD_LIBRARY_PATH is the issue? I can’t seem to find what I should set
this
path to based on a search of the file system. Should I set LD_Library or
any other path variables besides the PYTHONPATH for the Ettus package?
Thanks!

6

Nicholas,
I’m not finding anything related to gnuradio in /usr/lib, although the
file
names may not be obvious. Is there anything else I should try? Does the
deb
package take care of dependencies? I was expecting it to but I don’t
believe dpkg installed any dependencies. If the deb does not handle
dependencies, is there a list of dependencies for 12.04 such as the
apt-get
lists
here?http://gnuradio.org/redmine/projects/gnuradio/wiki/UbuntuInstall

-Dan

7

You shouldn’t need to set any of those variables manually. By default,
your system looks at /usr/lib for libraries, and all of our libraries
are stored there.