ImportError: No module named _dsss_swig

[caluml]

Are the build instructions correct?

I appreciate this isn't a support channel, but I've followed the build instructions, and when I run parameterized_DSSS_encode_decode.grc, I end up with:
ImportError: No module named _dsss_swig

Here is the full output of my build.

[user@gnuradio ~]$ git clone https://github.com/kantooon/gr-dsss
Cloning into 'gr-dsss'...
remote: Enumerating objects: 146, done.
remote: Total 146 (delta 0), reused 0 (delta 0), pack-reused 146
Receiving objects: 100% (146/146), 235.72 KiB | 1.59 MiB/s, done.
Resolving deltas: 100% (67/67), done.
[user@gnuradio ~]$ cd gr-dsss/
[user@gnuradio gr-dsss]$ mkdir build
[user@gnuradio gr-dsss]$ cd build/
[user@gnuradio build]$ cmake -DCMAKE_INSTALL_PREFIX:PATH=/usr/local ..
-- The CXX compiler identification is GNU 9.3.1
-- The C compiler identification is GNU 9.3.1
-- Check for working CXX compiler: /usr/bin/c++
-- Check for working CXX compiler: /usr/bin/c++ - works
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Detecting CXX compile features
-- Detecting CXX compile features - done
-- Check for working C compiler: /usr/bin/cc
-- Check for working C compiler: /usr/bin/cc - works
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Detecting C compile features
-- Detecting C compile features - done
-- Build type not specified: defaulting to release.
-- Found Boost: /usr/include (found suitable version "1.69.0", minimum required is "1.35") found components: filesystem system
CMake Warning (dev) at /usr/share/cmake/Modules/FindPackageHandleStandardArgs.cmake:272 (message):
The package name passed to find_package_handle_standard_args (PkgConfig)
does not match the name of the calling package (CppUnit). This can lead to
problems in calling code that expects find_package result variables
(e.g., _FOUND) to follow a certain pattern.
Call Stack (most recent call first):
/usr/share/cmake/Modules/FindPkgConfig.cmake:45 (find_package_handle_standard_args)
cmake/Modules/FindCppUnit.cmake:12 (INCLUDE)
CMakeLists.txt:86 (find_package)
This warning is for project developers. Use -Wno-dev to suppress it.

-- Found PkgConfig: /usr/bin/pkg-config (found version "1.6.1")
-- Checking for module 'cppunit'
-- Found cppunit, version 1.14.0
CMake Warning (dev) at /usr/share/cmake/Modules/FindPackageHandleStandardArgs.cmake:272 (message):
The package name passed to find_package_handle_standard_args (CPPUNIT)
does not match the name of the calling package (CppUnit). This can lead to
problems in calling code that expects find_package result variables
(e.g., _FOUND) to follow a certain pattern.
Call Stack (most recent call first):
cmake/Modules/FindCppUnit.cmake:35 (FIND_PACKAGE_HANDLE_STANDARD_ARGS)
CMakeLists.txt:86 (find_package)
This warning is for project developers. Use -Wno-dev to suppress it.

-- Found CPPUNIT: /usr/lib64/libcppunit.so;dl
CMake Warning (dev) at /usr/share/cmake/Modules/FindPackageHandleStandardArgs.cmake:272 (message):
The package name passed to find_package_handle_standard_args (PkgConfig)
does not match the name of the calling package (Gnuradio). This can lead
to problems in calling code that expects find_package result variables
(e.g., _FOUND) to follow a certain pattern.
Call Stack (most recent call first):
/usr/share/cmake/Modules/FindPkgConfig.cmake:45 (find_package_handle_standard_args)
/usr/lib64/cmake/gnuradio/GnuradioConfig.cmake:20 (INCLUDE)
CMakeLists.txt:93 (find_package)
This warning is for project developers. Use -Wno-dev to suppress it.

Checking for GNU Radio Module: RUNTIME
-- Checking for module 'gnuradio-runtime'
-- Found gnuradio-runtime, version 3.7.13.5

• INCLUDES=/usr/include
• LIBS=/lib64/libgnuradio-runtime.so;/lib64/libgnuradio-pmt.so
  CMake Warning (dev) at /usr/share/cmake/Modules/FindPackageHandleStandardArgs.cmake:272 (message):
  The package name passed to find_package_handle_standard_args
  (GNURADIO_RUNTIME) does not match the name of the calling package
  (Gnuradio). This can lead to problems in calling code that expects
  find_package result variables (e.g., _FOUND) to follow a certain
  pattern.
  Call Stack (most recent call first):
  /usr/lib64/cmake/gnuradio/GnuradioConfig.cmake:108 (FIND_PACKAGE_HANDLE_STANDARD_ARGS)
  /usr/lib64/cmake/gnuradio/GnuradioConfig.cmake:121 (GR_MODULE)
  CMakeLists.txt:93 (find_package)
  This warning is for project developers. Use -Wno-dev to suppress it.

-- Found GNURADIO_RUNTIME: /lib64/libgnuradio-runtime.so;/lib64/libgnuradio-pmt.so
GNURADIO_RUNTIME_FOUND = TRUE
CMake Warning (dev) at /usr/lib64/cmake/gnuradio/GrTest.cmake:45 (get_target_property):
Policy CMP0026 is not set: Disallow use of the LOCATION target property.
Run "cmake --help-policy CMP0026" for policy details. Use the cmake_policy
command to set the policy and suppress this warning.

The LOCATION property should not be read from target "test-dsss". Use the
target name directly with add_custom_command, or use the generator
expression $<TARGET_FILE>, as appropriate.

Call Stack (most recent call first):
lib/CMakeLists.txt:81 (GR_ADD_TEST)
This warning is for project developers. Use -Wno-dev to suppress it.

--
-- Checking for module SWIG
-- Found SWIG version 3.0.12.
-- Found SWIG: /usr/bin/swig
-- Found PythonLibs: /usr/lib64/libpython2.7.so (found suitable version "2.7.18", minimum required is "2")
-- Found PythonInterp: /usr/bin/python2 (found suitable version "2.7.18", minimum required is "2")
-- Performing Test HAVE_WNO_UNUSED_BUT_SET_VARIABLE
-- Performing Test HAVE_WNO_UNUSED_BUT_SET_VARIABLE - Success
CMake Warning (dev) at /usr/lib64/cmake/gnuradio/GrTest.cmake:45 (get_target_property):
Policy CMP0026 is not set: Disallow use of the LOCATION target property.
Run "cmake --help-policy CMP0026" for policy details. Use the cmake_policy
command to set the policy and suppress this warning.

The LOCATION property should not be read from target "gnuradio-dsss". Use
the target name directly with add_custom_command, or use the generator
expression $<TARGET_FILE>, as appropriate.

Call Stack (most recent call first):
python/CMakeLists.txt:44 (GR_ADD_TEST)
This warning is for project developers. Use -Wno-dev to suppress it.

CMake Warning (dev) at /usr/lib64/cmake/gnuradio/GrTest.cmake:45 (get_target_property):
Policy CMP0045 is not set: Error on non-existent target in
get_target_property. Run "cmake --help-policy CMP0045" for policy details.
Use the cmake_policy command to set the policy and suppress this warning.

get_target_property() called with non-existent target "/usr/bin/python2".
Call Stack (most recent call first):
python/CMakeLists.txt:44 (GR_ADD_TEST)
This warning is for project developers. Use -Wno-dev to suppress it.

CMake Warning (dev) at /usr/lib64/cmake/gnuradio/GrTest.cmake:45 (get_target_property):
Policy CMP0045 is not set: Error on non-existent target in
get_target_property. Run "cmake --help-policy CMP0045" for policy details.
Use the cmake_policy command to set the policy and suppress this warning.

get_target_property() called with non-existent target
"/home/user/gr-dsss/python/qa_dsss_encoder_bb.py".
Call Stack (most recent call first):
python/CMakeLists.txt:44 (GR_ADD_TEST)
This warning is for project developers. Use -Wno-dev to suppress it.

CMake Warning (dev) at /usr/lib64/cmake/gnuradio/GrTest.cmake:45 (get_target_property):
Policy CMP0026 is not set: Disallow use of the LOCATION target property.
Run "cmake --help-policy CMP0026" for policy details. Use the cmake_policy
command to set the policy and suppress this warning.

The LOCATION property should not be read from target "gnuradio-dsss". Use
the target name directly with add_custom_command, or use the generator
expression $<TARGET_FILE>, as appropriate.

Call Stack (most recent call first):
python/CMakeLists.txt:45 (GR_ADD_TEST)
This warning is for project developers. Use -Wno-dev to suppress it.

CMake Warning (dev) at /usr/lib64/cmake/gnuradio/GrTest.cmake:45 (get_target_property):
Policy CMP0045 is not set: Error on non-existent target in
get_target_property. Run "cmake --help-policy CMP0045" for policy details.
Use the cmake_policy command to set the policy and suppress this warning.

get_target_property() called with non-existent target "/usr/bin/python2".
Call Stack (most recent call first):
python/CMakeLists.txt:45 (GR_ADD_TEST)
This warning is for project developers. Use -Wno-dev to suppress it.

CMake Warning (dev) at /usr/lib64/cmake/gnuradio/GrTest.cmake:45 (get_target_property):
Policy CMP0045 is not set: Error on non-existent target in
get_target_property. Run "cmake --help-policy CMP0045" for policy details.
Use the cmake_policy command to set the policy and suppress this warning.

get_target_property() called with non-existent target
"/home/user/gr-dsss/python/qa_dsss_decoder_cc.py".
Call Stack (most recent call first):
python/CMakeLists.txt:45 (GR_ADD_TEST)
This warning is for project developers. Use -Wno-dev to suppress it.

-- Found Doxygen: /usr/bin/doxygen (found version "1.8.15") found components: doxygen dot
-- Configuring done
-- Generating done
-- Build files have been written to: /home/user/gr-dsss/build
[user@gnuradio build]$ make
Scanning dependencies of target gnuradio-dsss
[ 5%] Building CXX object lib/CMakeFiles/gnuradio-dsss.dir/dsss_encoder_bb_impl.cc.o
[ 10%] Building CXX object lib/CMakeFiles/gnuradio-dsss.dir/dsss_decoder_cc_impl.cc.o
[ 15%] Linking CXX shared library libgnuradio-dsss.so
[ 15%] Built target gnuradio-dsss
Scanning dependencies of target test-dsss
[ 20%] Building CXX object lib/CMakeFiles/test-dsss.dir/test_dsss.cc.o
[ 25%] Building CXX object lib/CMakeFiles/test-dsss.dir/qa_dsss.cc.o
[ 30%] Linking CXX executable test-dsss
[ 30%] Built target test-dsss
Scanning dependencies of target dsss_swig_swig_doc
[ 30%] Built target dsss_swig_swig_doc
Scanning dependencies of target _dsss_swig_swig_tag
[ 35%] Building CXX object swig/CMakeFiles/_dsss_swig_swig_tag.dir/_dsss_swig_swig_tag.cpp.o
[ 40%] Linking CXX executable _dsss_swig_swig_tag
[ 40%] Built target _dsss_swig_swig_tag
[ 45%] Generating dsss_swig.tag
Scanning dependencies of target dsss_swig_swig_2d0df
[ 50%] Building CXX object swig/CMakeFiles/dsss_swig_swig_2d0df.dir/dsss_swig_swig_2d0df.cpp.o
[ 55%] Linking CXX executable dsss_swig_swig_2d0df
Swig source
[ 55%] Built target dsss_swig_swig_2d0df
Scanning dependencies of target _dsss_swig
[ 60%] Building CXX object swig/CMakeFiles/_dsss_swig.dir/dsss_swigPYTHON_wrap.cxx.o
[ 65%] Linking CXX shared module _dsss_swig.so
[ 75%] Built target _dsss_swig
Scanning dependencies of target pygen_swig_f588f
[ 80%] Generating dsss_swig.pyc
[ 85%] Generating dsss_swig.pyo
[ 90%] Built target pygen_swig_f588f
Scanning dependencies of target pygen_python_8b794
[ 95%] Generating init.pyc
[100%] Generating init.pyo
[100%] Built target pygen_python_8b794
Scanning dependencies of target pygen_apps_9a6dd
[100%] Built target pygen_apps_9a6dd
[user@gnuradio build]$ sudo make install
[ 15%] Built target gnuradio-dsss
[ 30%] Built target test-dsss
[ 30%] Built target dsss_swig_swig_doc
[ 40%] Built target _dsss_swig_swig_tag
[ 55%] Built target dsss_swig_swig_2d0df
[ 75%] Built target _dsss_swig
[ 90%] Built target pygen_swig_f588f
[100%] Built target pygen_python_8b794
[100%] Built target pygen_apps_9a6dd
Install the project...
-- Install configuration: "Release"
-- Installing: /usr/local/lib/cmake/dsss/dsssConfig.cmake
-- Installing: /usr/local/include/dsss/api.h
-- Installing: /usr/local/include/dsss/dsss_encoder_bb.h
-- Installing: /usr/local/include/dsss/dsss_decoder_cc.h
-- Installing: /usr/local/lib64/libgnuradio-dsss.so
-- Installing: /usr/local/lib64/python2.7/site-packages/dsss/_dsss_swig.so
-- Set runtime path of "/usr/local/lib64/python2.7/site-packages/dsss/_dsss_swig.so" to ""
-- Installing: /usr/local/lib64/python2.7/site-packages/dsss/dsss_swig.py
-- Installing: /usr/local/lib64/python2.7/site-packages/dsss/dsss_swig.pyc
-- Installing: /usr/local/lib64/python2.7/site-packages/dsss/dsss_swig.pyo
-- Installing: /usr/local/include/dsss/dsss/swig/dsss_swig.i
-- Installing: /usr/local/include/dsss/dsss/swig/dsss_swig_doc.i
-- Installing: /usr/local/lib64/python2.7/site-packages/dsss/init.py
-- Installing: /usr/local/lib64/python2.7/site-packages/dsss/init.pyc
-- Installing: /usr/local/lib64/python2.7/site-packages/dsss/init.pyo
-- Installing: /usr/local/share/gnuradio/grc/blocks/dsss_dsss_encoder_bb.xml
-- Installing: /usr/local/share/gnuradio/grc/blocks/dsss_dsss_decoder_cc.xml
[user@gnuradio build]$

Then I load the example:
[user@gnuradio build]$ gnuradio-companion ../examples/parameterized_DSSS_encode_decode.grc
<<< Welcome to GNU Radio Companion 3.7.13.5 >>>

Block paths:
/usr/share/gnuradio/grc/blocks
/usr/local/share/gnuradio/grc/blocks

Loading: "/home/user/gr-dsss/examples/parameterized_DSSS_encode_decode.grc"

Done

Finally, When I Run, Generate, and then Run, Execute, I get:

Executing: /usr/bin/python2 -u /home/user/gr-dsss/examples/top_block.py

Traceback (most recent call last):
File "/home/user/gr-dsss/examples/top_block.py", line 32, in
import dsss
File "/usr/lib/python2.7/site-packages/dsss/init.py", line 45, in
from dsss_swig import *
File "/usr/lib/python2.7/site-packages/dsss/dsss_swig.py", line 17, in
_dsss_swig = swig_import_helper()
File "/usr/lib/python2.7/site-packages/dsss/dsss_swig.py", line 16, in swig_import_helper
return importlib.import_module('_dsss_swig')
File "/usr/lib64/python2.7/importlib/init.py", line 37, in import_module
import(name)
ImportError: No module named _dsss_swig

Done (return code 1)

[kantooon]

You have a Python import path problem. The example flowgraph is looking to load the block from /usr/lib while the install output clearly shows it has been installed in /usr/local/lib64.
Or you could have two existing and conflicting installs one in each path, with the more recent and correct one being in /usr/local/lib64. Try removing the install from /usr/lib or adjust your PYTHONPATH to looks at /usr/local first.

[mikeazo]

I'm getting the same issue here when I try to run your example. I used docker-gnuradio to build GnuRadio 3.7, then cloned your repo and built it. When I run the example, I get the same error.

Similarly, running python2.7 from the command-line then typing import dsss gets the same error.

[GCC 7.5.0] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import dsss
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/local/lib/python2.7/dist-packages/dsss/__init__.py", line 45, in <module>
    from dsss_swig import *
  File "/usr/local/lib/python2.7/dist-packages/dsss/dsss_swig.py", line 17, in <module>
    _dsss_swig = swig_import_helper()
  File "/usr/local/lib/python2.7/dist-packages/dsss/dsss_swig.py", line 16, in swig_import_helper
    return importlib.import_module('_dsss_swig')
  File "/usr/lib/python2.7/importlib/__init__.py", line 37, in import_module
    __import__(name)
ImportError: No module named _dsss_swig
>>> 

Just for your awareness

$ ls /usr/local/lib/python2.7/dist-packages/dsss/
__init__.py  __init__.pyc  __init__.pyo  _dsss_swig.so  dsss_swig.py  dsss_swig.pyc  dsss_swig.pyo
$ echo $PYTHONPATH
:/usr/local/lib/python2.7/dist-packages:/usr/local/lib/python3/dist-packages

[mikeazo]

I was able to get it to work correctly by setting my LD_LIBRARY_PATH correctly.