title: "ImportError no module named gnuradio" when trying to execute ./uhd_fft
body: <p>I have followed instructions out lined here: </p>
  
  <p><a href="http://forums.nuand.com/forums/viewtopic.php?f=9&amp;t=2804" rel="nofollow">http://forums.nuand.com/forums/viewtopic.php?f=9&amp;t=2804</a></p>
  
  <p>and installed GNU Radio from GIT repo (scroll down to the section that says "Building GNURADIO from GIT".  I used the ./build-gnuradio.sh script to do this and it took a while, but it appeared to build successfully, as per the instructions. </p>
  
  <p>I am running on Ubuntu 12.04 LTS.  </p>
  
  <p>When I attempt to run the "./uhd_fft" function I get the following error message: </p>
  
  <pre><code>Traceback (most recent call last):
    File "./uhd_fft", line 23, in &lt;module&gt;
      from gnuradio import gr, gru
  ImportError: No module named gnuradio
  </code></pre>
  
  <p>I have Googled this error message and most of the forums claim there is a problem with the PYTHONPATH.  </p>
  
  <p>When I do </p>
  
  <pre><code>echo $PYTHONPATH
  /usr/bin/python2.7
  </code></pre>
  
  <p>But when I check the python2.7 directory I do not see gnuradio.  So I guess it makes sense I'm getting an import error when it tries to import gnuradio. But the bigger question is why? </p>
  
  <p>I installed GNU Radio (per instructions from nuand forum) using ./build-gnuradio.sh script.  So I should have it installed.  </p>
  
  <p>I would appreciate if it python / GNU Radio experts from the community could weigh in. </p>