No module named _util

[ompl]

No module named _util

[mamoll]

Original comment by Mark Moll (Bitbucket: mamoll, GitHub: mamoll).

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Did you install Py++ and generate the python bindings? If not, the GUI won't run. To generate and build them, type the following in your build directory:

make installpyplusplus
cmake .
make -j 5

[mamoll]

Original comment by Andy H. (Bitbucket: Andy_H, ).

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Thats exactly what I did. It compiled and generated without problems. But I still get the same error ):

[mamoll]

Original comment by Mark Moll (Bitbucket: mamoll, GitHub: mamoll).

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Can you attach pyplusplus_util.log from your build directory?

[mamoll]

Original comment by Andy H. (Bitbucket: Andy_H, ).

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Hi Mark,

thanks for your help! Here is the log:

#!python

INFO Parsing source file "bindings/util.h" ... 
INFO gccxml cmd: /usr/bin/gccxml  -I"." -I"/home/hermann-local/src/omplapp/omplapp-0.11.1-Source/ompl/src" -I"/home/hermann-local/src/omplapp/omplapp-0.11.1-Source/src" -I"/usr/include/python2.7" -I"/usr/include" -I"/home/hermann-local/src/omplapp/omplapp-0.11.1-Source/o
mpl/src/external"   "bindings/util.h" -fxml="/tmp/tmpZQSZwU.xml"
INFO GCCXML version - 0.9( 1.135 )

WARNING: extern void ompl::msg::log(char const * file, int line, ompl::msg::LogLevel level, char const * m, ...) [free function]
> warning W1053: `Py++` will not expose function "extern void
> ompl::msg::log(char const * file, int line, ompl::msg::LogLevel level, char
> const * m, ...) [free function]" - the function has variable-argument list,
> spicified by ellipsis (...).

INFO: file "named_tuple.py" - updated( 0.000000 seconds )

INFO: file "container_suite.hpp" - updated( 0.000000 seconds )

INFO: file "slice.hpp" - updated( 0.000000 seconds )

INFO: file "set.hpp" - updated( 0.000000 seconds )

INFO: file "element_proxy_traits.hpp" - updated( 0.000000 seconds )

INFO: file "python_iterator.hpp" - updated( 0.000000 seconds )

INFO: file "proxy_iterator.hpp" - updated( 0.000000 seconds )

INFO: file "element_proxy.hpp" - updated( 0.000000 seconds )

INFO: file "slice_handler.hpp" - updated( 0.000000 seconds )

INFO: file "workaround.hpp" - updated( 0.000000 seconds )

INFO: file "value_traits.hpp" - updated( 0.000000 seconds )

INFO: file "visitor.hpp" - updated( 0.000000 seconds )

INFO: file "algorithms.hpp" - updated( 0.000000 seconds )

INFO: file "vector.hpp" - updated( 0.000000 seconds )

INFO: file "methods.hpp" - updated( 0.000000 seconds )

INFO: file "deque.hpp" - updated( 0.000000 seconds )

INFO: file "shared_proxy_impl.hpp" - updated( 0.000000 seconds )

INFO: file "iterator_range.hpp" - updated( 0.000000 seconds )

INFO: file "int_slice_helper.hpp" - updated( 0.010000 seconds )

INFO: file "container_traits.hpp" - updated( 0.000000 seconds )

INFO: file "suite_utils.hpp" - updated( 0.000000 seconds )

INFO: file "list.hpp" - updated( 0.000000 seconds )

INFO: file "map.hpp" - updated( 0.000000 seconds )

INFO: file "iterator_traits.hpp" - updated( 0.000000 seconds )

INFO: file "container_proxy.hpp" - updated( 0.000000 seconds )

INFO: file "multimap.hpp" - updated( 0.000000 seconds )

INFO: file "pair.hpp" - updated( 0.000000 seconds )

INFO: file "registry_utils.hpp" - updated( 0.000000 seconds )

INFO: file "_mapStringToString__value_traits.pypp.hpp" - updated( 0.000000 seconds )

INFO: file "_vectorDouble__value_traits.pypp.hpp" - updated( 0.010000 seconds )

INFO: file "_vectorInt__value_traits.pypp.hpp" - updated( 0.000000 seconds )

INFO: file "_vectorUint__value_traits.pypp.hpp" - updated( 0.000000 seconds )

INFO: file "vectorSizeT.pypp.hpp" - updated( 0.000000 seconds )

INFO: file "vectorSizeT.pypp.cpp" - updated( 0.000000 seconds )

INFO: file "vectorUint.pypp.hpp" - updated( 0.000000 seconds )

INFO: file "vectorUint.pypp.cpp" - updated( 0.000000 seconds )

INFO: file "vectorVectorUint.pypp.hpp" - updated( 0.000000 seconds )

INFO: file "vectorVectorUint.pypp.cpp" - updated( 0.000000 seconds )

INFO: file "vectorVectorInt.pypp.hpp" - updated( 0.000000 seconds )

INFO: file "vectorVectorInt.pypp.cpp" - updated( 0.000000 seconds )

INFO: file "vectorVectorDouble.pypp.hpp" - updated( 0.000000 seconds )

INFO: file "vectorVectorDouble.pypp.cpp" - updated( 0.000000 seconds )

INFO: file "vectorString.pypp.hpp" - updated( 0.000000 seconds )

INFO: file "vectorString.pypp.cpp" - updated( 0.000000 seconds )

INFO: file "vectorMapStringToString.pypp.hpp" - updated( 0.000000 seconds )

INFO: file "vectorMapStringToString.pypp.cpp" - updated( 0.000000 seconds )

INFO: file "vectorInt.pypp.hpp" - updated( 0.000000 seconds )

INFO: file "vectorInt.pypp.cpp" - updated( 0.000000 seconds )

INFO: file "vectorDouble.pypp.hpp" - updated( 0.000000 seconds )

INFO: file "vectorDouble.pypp.cpp" - updated( 0.000000 seconds )

INFO: file "vectorBool.pypp.hpp" - updated( 0.000000 seconds )

INFO: file "vectorBool.pypp.cpp" - updated( 0.000000 seconds )

INFO: file "mapStringToString.pypp.hpp" - updated( 0.000000 seconds )

INFO: file "mapStringToString.pypp.cpp" - updated( 0.000000 seconds )

INFO: file "Exception.pypp.hpp" - updated( 0.000000 seconds )

INFO: file "Exception.pypp.cpp" - updated( 0.000000 seconds )

INFO: file "RNG.pypp.hpp" - updated( 0.000000 seconds )

INFO: file "RNG.pypp.cpp" - updated( 0.000000 seconds )

INFO: file "OutputHandler.pypp.hpp" - updated( 0.000000 seconds )

INFO: file "OutputHandler.pypp.cpp" - updated( 0.000000 seconds )

INFO: file "OutputHandlerFile.pypp.hpp" - updated( 0.000000 seconds )

INFO: file "OutputHandlerFile.pypp.cpp" - updated( 0.000000 seconds )

INFO: file "OutputHandlerSTD.pypp.hpp" - updated( 0.000000 seconds )

INFO: file "OutputHandlerSTD.pypp.cpp" - updated( 0.000000 seconds )

INFO: file "_util_enumerations.pypp.hpp" - updated( 0.000000 seconds )

INFO: file "_util_enumerations.pypp.cpp" - updated( 0.000000 seconds )

INFO: file "_util_free_functions.pypp.hpp" - updated( 0.000000 seconds )

INFO: file "_util_free_functions.pypp.cpp" - updated( 0.000000 seconds )

INFO: file "_util.main.cpp" - updated( 0.000000 seconds )

[mamoll]

Original comment by Mark Moll (Bitbucket: mamoll, GitHub: mamoll).

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That looks about right. Can you attach the output of typing this command in your build directory:

make VERBOSE=1 py_ompl

[mamoll]

Original comment by Andy H. (Bitbucket: Andy_H, ).

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Hi Mark,

the second build did the trick! No errors and somehow this time _util was generated (:
The GUI is running now. I don't understand that, as I think, "make py_ompl" is a part of the regular make-script, isn't it?

Thanks for your quick help,
Andreas

[mamoll]

Original comment by Mark Moll (Bitbucket: mamoll, GitHub: mamoll).

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I don't quite understand what happened either. Glad it works now. If you find out what went wrong and if our instructions were to blame, let me know. I am closing this issue as resolved.

[mamoll]

Original comment by Victor (Bitbucket: victorp28, ).

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I had the exact same issue. make py_ompl resolved it as well (after significant compilation time, ~5 minutes).

[mamoll]

Original comment by Shams F (Bitbucket: shams1363, GitHub: shams1363).

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I have the exact same problem, and "make py_ompl" did not help at all. Could you please help me out.

[mamoll]

Original comment by Mark Moll (Bitbucket: mamoll, GitHub: mamoll).

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Shams, did you try this?:

make installpyplusplus
make update_bindings -j 5
make -j 5

[mamoll]

Original comment by Shams F (Bitbucket: shams1363, GitHub: shams1363).

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It works now. Could you please tell me what the trick of -j 5 is? I tried it before without that, and it did not work. Now everything works perfectly.

[mamoll]

Original comment by Mark Moll (Bitbucket: mamoll, GitHub: mamoll).

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"-j 5" just tells "make" to build in parallel using at most 5 threads. This does not explain why things suddenly work. Are you sure you did all the steps before?

[mamoll]

Original comment by Shams F (Bitbucket: shams1363, GitHub: shams1363).

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Yes I am sure. I installed it on one machine and it worked with no problem. Then I installed it on another machine with ubuntu 32 bits, and it failed. I changed the operating system to 64 bits. It failed again. After running this command, it worked. However, I do not see any reason.

[mamoll]

Original comment by hunaiz (Bitbucket: hunaiz, GitHub: hunaiz).

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Hi I am having the same issue. I am trying to run "./ompl_app.py" but it gives me the error "ImportError: No module named _util". Than I tried to run "make installpyplusplus" in ~/ompl/build directory but it gives error: "make: *** No rule to make target `installpyplusplus'. Stop." I tried the command "make installpyplusplus" in build/Release folder, it runs but still unable to run "./ompl_app.py". What can be done? Thanks

[mamoll]

Original comment by hunaiz (Bitbucket: hunaiz, GitHub: hunaiz).

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I resolved the issue. I needed to run "$ make installpyplusplus" in ~/ompl/build/Release directory instead of ~/ompl/build and than "$ make" command in ~/ompl/build/Release.

[mamoll]

Original comment by Anna Seppala (Bitbucket: Kirjain, ).

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Hi I am having similar problems. I get the same error as posted above:

python omplapp-0.11.1-Source/gui/ompl_app.py Traceback (most recent call last): File "omplapp-0.11.1-Source/gui/ompl_app.py", line 42, in from ompl.util import OutputHandler, useOutputHandler, LogLevel File "/home/hermann-local/src/omplapp/omplapp-0.11.1-Source/ompl/py-bindings/ompl/util/init.py", line 4, in from ompl.util._util import * ImportError: No module named _util

but when I try the solution proposed by Mark Moll, and run

$ make installpyplusplus

everything compiles fine but at the end I first get prompted for my user's password, after which I get the following error message:

[sudo] password for user:

Error: . is not a directory

make[3]: *** [src/CMakeFiles/installpyplusplus] Error 1

make[2]: *** [src/CMakeFiles/installpyplusplus.dir/all] Error 2

make[1]: *** [src/CMakeFiles/installpyplusplus.dir/rule] Error 2

make: *** [installpyplusplus] Error 2

What could be the problem?

Thank you for your time.

[mamoll]

Original comment by Mark Moll (Bitbucket: mamoll, GitHub: mamoll).

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@kirjain, your version of omplapp looks ancient (0.11.1). Please try the latest release, 1.1.1.

[mamoll]

Original comment by Anna Seppala (Bitbucket: Kirjain, ).

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Hi Mark,
sorry I just copied the message from above. I do have the newest version!
The error is still the same, though.

[mamoll]

Original comment by Andre Phu-Van Nguyen (Bitbucket: nguyenapv, ).

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For anyone coming to this issue in 2017 on ubuntu xenial (16.04) you might run into this issue if you have multiple python versions installed on your system. This makes it so that pip install might install a package for a python version different from which the bindings will be generated.

Just make sure you install things correctly using "pip2", "pip2.7", "pip3" or whatever command is used on your system to force the python version.

[mamoll]

Original comment by hossein shaeikhi (Bitbucket: hosh0425, GitHub: hosh0425).

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I have similar issue . I build both of omplapp-1.3.0 and ompl-1.3.0 but when i would run ompl_app.py I get that error . in my build/Release folder i have py_binding folders. also i havn't installpyplusplus make file

[mamoll]

Original comment by Mark Moll (Bitbucket: mamoll, GitHub: mamoll).

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@hosh0425, installpyplusplus no longer exists as a make target. You need to install CastXML, pygccxml, and pyplusplus yourself (or use the installation script if you are using Ubuntu 14.04, 15.10, or 16.04).

[mamoll]

Original comment by hossein shaeikhi (Bitbucket: hosh0425, GitHub: hosh0425).

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Dear Moll
I previously build them with the scribt that you said.

[mamoll]

Original comment by Mark Moll (Bitbucket: mamoll, GitHub: mamoll).

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@hosh0425, please attach pyplusplus_util.log from your build directory.

[mamoll]

Original comment by hossein shaeikhi (Bitbucket: hosh0425, GitHub: hosh0425).

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these are list of my build directory:
~/ompl-1.3.0-Source/build/Release$ ls
bin cmake_uninstall.cmake
doc scripts
castxml.cfg CPackConfig.cmake
install_manifest.txt src
CMakeCache.txt CPackSourceConfig.cmake
lib tests
CMakeFiles CTestTestfile.cmake Makefile
cmake_install.cmake demos py-bindings

I havn't pyplusplus_util.log

[mamoll]

Original comment by Mark Moll (Bitbucket: mamoll, GitHub: mamoll).

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What is the output of make update_bindings? (This should take several hours to complete.)

[mamoll]

Original comment by hossein shaeikhi (Bitbucket: hosh0425, GitHub: hosh0425).

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there isn't this file :////!!!!!
I download the ompl-1.3.0-source .
then in the install_ompl_ubuntu.sh comment this line:wget -O -
https://bitbucket.org/ompl/ompl/downloads/$OMPL-1.3.0-Source.tar.gz | tar
zxf -
then run it .
is this way true?

[mamoll]

Original comment by Amol Loya (Bitbucket: amolloya, GitHub: amolloya).

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Hi Mark, I'm not even trying to use the ompl_app, I am just installing the ompl libraries but it's still giving the following error:
from ompl.util._util import *
ModuleNotFoundError: No module named 'ompl.util._util'

I don't have have a pyplusplus_util.log file in my build directly as well.
I have installed py++ and boost.python and the installed the libraries.
I don't know what's wrong, please help me out here. Thanks!