NLopt 2.6.1 Python module import problem on Windows 10

[zhexinzhao]

I follow the instructions to install NLopt on Windows 10 with cmake and specified python plugin. It seems to be successful. However, when I want to import nlopt module in python, it fails with the following error. Would you please help me? Thank you very much.

(By the way, I found a similar problem when I install on Mac.)

python
import nlopt
Traceback (most recent call last):
File "", line 1, in
ModuleNotFoundError: No module named 'nlopt'

"cmake" command and output are:
cmake -G "Unix Makefiles" -DCMAKE_CXX_COMPILER=C:/cygwin64/bin/g++.exe -DCMAKE_C_COMPILER=C:/cygwin64/bin/gcc.exe -DPYTHON_EXECUTABLE=C:/Users/joann/Anaconda3/python.exe -DSWIG_EXECUTABLE=C:/cygwin64/home/joann/code_store/swigwin-4.0.1/swig.exe ..
-- The C compiler identification is GNU 7.4.0
-- The CXX compiler identification is GNU 7.4.0
-- Check for working C compiler: C:/cygwin64/bin/gcc.exe
-- Check for working C compiler: C:/cygwin64/bin/gcc.exe -- works
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Detecting C compile features
-- Detecting C compile features - done
-- Check for working CXX compiler: C:/cygwin64/bin/g++.exe
-- Check for working CXX compiler: C:/cygwin64/bin/g++.exe -- works
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Detecting CXX compile features
-- Detecting CXX compile features - done
-- NLopt version 2.6.1
-- Looking for dlfcn.h
-- Looking for dlfcn.h - found
-- Looking for getopt.h
-- Looking for getopt.h - found
-- Looking for unistd.h
-- Looking for unistd.h - found
-- Looking for string.h
-- Looking for string.h - found
-- Looking for strings.h
-- Looking for strings.h - found
-- Looking for inttypes.h
-- Looking for inttypes.h - found
-- Looking for memory.h
-- Looking for memory.h - found
-- Looking for stdlib.h
-- Looking for stdlib.h - found
-- Looking for stdint.h
-- Looking for stdint.h - found
-- Looking for time.h
-- Looking for time.h - found
-- Looking for sys/types.h
-- Looking for sys/types.h - found
-- Looking for sys/stat.h
-- Looking for sys/stat.h - found
-- Looking for sys/time.h
-- Looking for sys/time.h - found
-- Looking for getpid
-- Looking for getpid - found
-- Looking for syscall
-- Looking for syscall - not found
-- Looking for isinf
-- Looking for isinf - found
-- Looking for isnan
-- Looking for isnan - found
-- Looking for gettimeofday
-- Looking for gettimeofday - found
-- Looking for qsort_r
-- Looking for qsort_r - found
-- Looking for time
-- Looking for time - found
-- Looking for copysign
-- Looking for copysign - found
-- Looking for stddef.h
-- Looking for stddef.h - found
-- Check size of uint32_t
-- Check size of uint32_t - done
-- Check size of unsigned int
-- Check size of unsigned int - done
-- Check size of unsigned long
-- Check size of unsigned long - done
-- Looking for sqrt in m
-- Looking for sqrt in m - found
-- Looking for fpclassify
-- Looking for fpclassify - TRUE
-- Performing Test HAVE_THREAD_LOCAL_STORAGE
-- Performing Test HAVE_THREAD_LOCAL_STORAGE - Success
-- Performing Test HAVE_THREAD_LOCAL_STORAGE
-- Performing Test HAVE_THREAD_LOCAL_STORAGE - Success
-- Looking for __cplusplus
-- Looking for __cplusplus - found
-- Performing Test SUPPORTS_STDCXX11
-- Performing Test SUPPORTS_STDCXX11 - Success
-- Found PythonInterp: C:/Users/joann/Anaconda3/python.exe (found version "3.7.4")
-- Found PythonLibs: C:/Users/joann/Anaconda3/libs/python37.lib (found suitable exact version "3.7.4")
-- Could NOT find Guile (missing: GUILE_EXECUTABLE GUILE_ROOT_DIR GUILE_INCLUDE_DIRS GUILE_LIBRARIES)
-- Found SWIG: C:/cygwin64/home/joann/code_store/swigwin-4.0.1/swig.exe (found version "4.0.1")
-- Performing Test UNDEFINED_SYMBOLS_ALLOWED - Failed
-- Could NOT find Octave (missing: OCTAVE_EXECUTABLE OCTAVE_ROOT_DIR OCTAVE_LIBRARIES)
-- Could NOT find Matlab (missing: Matlab_MEX_LIBRARY Matlab_MEX_EXTENSION Matlab_MX_LIBRARY Matlab_ENGINE_LIBRARY Matlab_DATAARRAY_LIBRARY MX_LIBRARY) (found version "9.5")
-- Configuring done
-- Generating done
-- Build files have been written to: C:/cygwin64/home/joann/code_store/nlopt/build

"make" outputs are:
make
Scanning dependencies of target nlopt
[ 1%] Building C object CMakeFiles/nlopt.dir/src/algs/direct/DIRect.c.obj
[ 3%] Building C object CMakeFiles/nlopt.dir/src/algs/direct/direct_wrap.c.obj
[ 5%] Building C object CMakeFiles/nlopt.dir/src/algs/direct/DIRserial.c.obj
[ 7%] Building C object CMakeFiles/nlopt.dir/src/algs/direct/DIRsubrout.c.obj
[ 9%] Building C object CMakeFiles/nlopt.dir/src/algs/cdirect/cdirect.c.obj
[ 10%] Building C object CMakeFiles/nlopt.dir/src/algs/cdirect/hybrid.c.obj
[ 12%] Building C object CMakeFiles/nlopt.dir/src/algs/praxis/praxis.c.obj
[ 14%] Building C object CMakeFiles/nlopt.dir/src/algs/luksan/plis.c.obj
[ 16%] Building C object CMakeFiles/nlopt.dir/src/algs/luksan/plip.c.obj
[ 18%] Building C object CMakeFiles/nlopt.dir/src/algs/luksan/pnet.c.obj
[ 20%] Building C object CMakeFiles/nlopt.dir/src/algs/luksan/mssubs.c.obj
[ 21%] Building C object CMakeFiles/nlopt.dir/src/algs/luksan/pssubs.c.obj
[ 23%] Building C object CMakeFiles/nlopt.dir/src/algs/crs/crs.c.obj
[ 25%] Building C object CMakeFiles/nlopt.dir/src/algs/mlsl/mlsl.c.obj
[ 27%] Building C object CMakeFiles/nlopt.dir/src/algs/mma/mma.c.obj
[ 29%] Building C object CMakeFiles/nlopt.dir/src/algs/mma/ccsa_quadratic.c.obj
[ 30%] Building C object CMakeFiles/nlopt.dir/src/algs/cobyla/cobyla.c.obj
[ 32%] Building C object CMakeFiles/nlopt.dir/src/algs/newuoa/newuoa.c.obj
[ 34%] Building C object CMakeFiles/nlopt.dir/src/algs/neldermead/nldrmd.c.obj
[ 36%] Building C object CMakeFiles/nlopt.dir/src/algs/neldermead/sbplx.c.obj
[ 38%] Building C object CMakeFiles/nlopt.dir/src/algs/auglag/auglag.c.obj
[ 40%] Building C object CMakeFiles/nlopt.dir/src/algs/bobyqa/bobyqa.c.obj
[ 41%] Building C object CMakeFiles/nlopt.dir/src/algs/isres/isres.c.obj
[ 43%] Building C object CMakeFiles/nlopt.dir/src/algs/slsqp/slsqp.c.obj
[ 45%] Building C object CMakeFiles/nlopt.dir/src/algs/esch/esch.c.obj
[ 47%] Building C object CMakeFiles/nlopt.dir/src/api/general.c.obj
[ 49%] Building C object CMakeFiles/nlopt.dir/src/api/options.c.obj
[ 50%] Building C object CMakeFiles/nlopt.dir/src/api/optimize.c.obj
[ 52%] Building C object CMakeFiles/nlopt.dir/src/api/deprecated.c.obj
[ 54%] Building C object CMakeFiles/nlopt.dir/src/api/f77api.c.obj
[ 56%] Building C object CMakeFiles/nlopt.dir/src/util/mt19937ar.c.obj
[ 58%] Building C object CMakeFiles/nlopt.dir/src/util/sobolseq.c.obj
[ 60%] Building C object CMakeFiles/nlopt.dir/src/util/timer.c.obj
[ 61%] Building C object CMakeFiles/nlopt.dir/src/util/stop.c.obj
[ 63%] Building C object CMakeFiles/nlopt.dir/src/util/redblack.c.obj
[ 65%] Building C object CMakeFiles/nlopt.dir/src/util/qsort_r.c.obj
[ 67%] Building C object CMakeFiles/nlopt.dir/src/util/rescale.c.obj
[ 69%] Building CXX object CMakeFiles/nlopt.dir/src/algs/stogo/global.cc.o
[ 70%] Building CXX object CMakeFiles/nlopt.dir/src/algs/stogo/linalg.cc.o
[ 72%] Building CXX object CMakeFiles/nlopt.dir/src/algs/stogo/local.cc.o
[ 74%] Building CXX object CMakeFiles/nlopt.dir/src/algs/stogo/stogo.cc.o
[ 76%] Building CXX object CMakeFiles/nlopt.dir/src/algs/stogo/tools.cc.o
[ 78%] Building CXX object CMakeFiles/nlopt.dir/src/algs/ags/evolvent.cc.o
[ 80%] Building CXX object CMakeFiles/nlopt.dir/src/algs/ags/solver.cc.o
[ 81%] Building CXX object CMakeFiles/nlopt.dir/src/algs/ags/local_optimizer.cc.o
[ 83%] Building CXX object CMakeFiles/nlopt.dir/src/algs/ags/ags.cc.o
[ 85%] Linking CXX shared library libnlopt.dll
[ 85%] Built target nlopt
Scanning dependencies of target testopt
[ 87%] Building C object test/CMakeFiles/testopt.dir/testfuncs.c.obj
[ 89%] Building C object test/CMakeFiles/testopt.dir/testopt.c.obj
[ 90%] Building C object test/CMakeFiles/testopt.dir//src/util/timer.c.obj
[ 92%] Building C object test/CMakeFiles/testopt.dir//src/util/mt19937ar.c.obj
[ 94%] Building C object test/CMakeFiles/testopt.dir/__/src/util/nlopt-getopt.c.obj
[ 96%] Linking CXX executable testopt.exe
[ 96%] Built target testopt
Scanning dependencies of target t_tutorial
[ 98%] Building CXX object test/CMakeFiles/t_tutorial.dir/t_tutorial.cxx.o
[100%] Linking CXX executable t_tutorial.exe
[100%] Built target t_tutorial

"make install" outputs are: (I run as Administrator.)
make install
[ 85%] Built target nlopt
[ 96%] Built target testopt
[100%] Built target t_tutorial
Install the project...
-- Install configuration: "Release"
-- Installing: C:/Program Files (x86)/nlopt/lib/pkgconfig/nlopt.pc
-- Installing: C:/Program Files (x86)/nlopt/include/nlopt.h
-- Installing: C:/Program Files (x86)/nlopt/include/nlopt.hpp
-- Installing: C:/Program Files (x86)/nlopt/include/nlopt.f
-- Installing: C:/Program Files (x86)/nlopt/lib/libnlopt.dll.a
-- Installing: C:/Program Files (x86)/nlopt/bin/libnlopt.dll
-- Installing: C:/Program Files (x86)/nlopt/lib/cmake/nlopt/NLoptLibraryDepends.cmake
-- Installing: C:/Program Files (x86)/nlopt/lib/cmake/nlopt/NLoptLibraryDepends-release.cmake
-- Installing: C:/Program Files (x86)/nlopt/lib/cmake/nlopt/NLoptConfig.cmake
-- Installing: C:/Program Files (x86)/nlopt/lib/cmake/nlopt/NLoptConfigVersion.cmake
-- Up-to-date: C:/Program Files (x86)/nlopt/share/man/man3/nlopt.3
-- Up-to-date: C:/Program Files (x86)/nlopt/share/man/man3/nlopt_minimize.3
-- Up-to-date: C:/Program Files (x86)/nlopt/share/man/man3/nlopt_minimize_constrained.3

[jschueller]

I think numpy could be missing