# Gr-tutorial/examples/tutorial4 Python module missing **URL:** \ **Category:** GNU Radio\ **Created:** [May 5, 2015, 5:58am UTC](https://www.ruby-forum.com/t/gr-tutorial-examples-tutorial4-python-module-missing/241835 "2015-05-05T05:58:14Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![Detlef\_R](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/d/58f4c7/32.png) [@Detlef\_R](https://www.ruby-forum.com/u/Detlef_R)\ **Post date:** [May 5, 2015, 5:58am UTC](https://www.ruby-forum.com/t/gr-tutorial-examples-tutorial4-python-module-missing/241835/1 "2015-05-05T05:58:14Z")
I have downloaded the most recent version of the gr-tutorial from github and installed it using cd gr-tutorial mkdir build cd build cmake … make sudo make install sudo ldconfig Everything works fine up to this point and I don’t get any error messages. When I open gr-tutorial/examples/tutorial4/my\_qpsk\_demod.grc in gnuradio-companion (3.7.6.1) the flowgraph displays correctly, but when I try to execute the flowgraph I get the error Traceback (most recent call last): File “/home/viby/gnuradio/gr-tutorial/examples/tutorial4/tutorial4\_demod.py”, line 23, in import tutorial ImportError: No module named tutorial > > > Done (return code 1) The first few lines of tutorial4\_demod.py are: 8 from PyQt4 import Qt 9 from PyQt4.QtCore import QObject, pyqtSlot 10 from gnuradio import analog 11 from gnuradio import blocks 12 from gnuradio import digital 13 from gnuradio import eng\_notation 14 from gnuradio import gr 15 from gnuradio import qtgui 16 from gnuradio.eng\_option import eng\_option 17 from gnuradio.filter import firdes 18 from optparse import OptionParser 19 import PyQt4.Qwt5 as Qwt 20 import numpy 21 import sip 22 import sys 23 import tutorial As far as I can tell build/cmake is not producing a tutorial module and I’m at a loss as to what exactly should go into this module. The constructor for the my\_qpsk\_demod\_cb block clearly relies on the tutorial module using: self.tutorial\_my\_qpsk\_demod\_cb\_0 = tutorial.my\_qpsk\_demod\_cb(True) What am I overlooking here? I use Ubuntu 14.04 and the PYTHONPATH is set to /usr/local/lib/python2.7/dist-packages Any help will be much appreciated and my apologies if I’m overlooking something obvious. ---
**Author:** ![dracos](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/d/ea666f/32.png) [@dracos](https://www.ruby-forum.com/u/dracos)\ **Post date:** [May 5, 2015, 6:30pm UTC](https://www.ruby-forum.com/t/gr-tutorial-examples-tutorial4-python-module-missing/241835/2 "2015-05-05T18:30:41Z")
Is there a tutorial module installed to /usr/local/lib/python2.7/dist-packages? M ---
**Author:** ![dracos](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/d/ea666f/32.png) [@dracos](https://www.ruby-forum.com/u/dracos)\ **Post date:** [May 6, 2015, 12:53am UTC](https://www.ruby-forum.com/t/gr-tutorial-examples-tutorial4-python-module-missing/241835/3 "2015-05-06T00:53:20Z")
I did actually find a tutorial.py file in /gr-tutorial/python (I expected it to be there yesterday, but must have overlooked it) and copied it to /usr/local/lib/python2.7/dist-packages. Now the error message that I get is ImportError: No module named \_tutorial\_swig If I search for \_tutorial\_swig in /gr-tutorial I find the following: viby@Lena:~/gnuradio/gr-tutorial$ find -name ‘\_tutorial\_swig\*’ ./build/swig/CMakeFiles/\_tutorial\_swig.dir ./build/swig/CMakeFiles/\_tutorial\_swig\_swig\_tag.dir ./build/swig/CMakeFiles/\_tutorial\_swig\_swig\_tag.dir/\_tutorial\_swig\_swig\_tag.cpp.o ./build/swig/CMakeFiles/\_tutorial\_swig\_doc\_tag.dir ./build/swig/CMakeFiles/\_tutorial\_swig\_doc\_tag.dir/\_tutorial\_swig\_doc\_tag.cpp.o ./build/swig/\_tutorial\_swig.so ./build/swig/\_tutorial\_swig\_swig\_tag ./build/swig/\_tutorial\_swig\_doc\_tag.cpp.in ./build/swig/\_tutorial\_swig\_swig\_tag.cpp.in ./build/swig/\_tutorial\_swig\_swig\_tag.cpp ./build/swig/\_tutorial\_swig\_doc\_tag.cpp ./build/swig/\_tutorial\_swig\_doc\_tag Do I need to copy any of these to the PYTHONPATH directory? -PM-