[Openexr-devel] Getting started with OpenExr python bindings

[James Crowther]

Hi there, 

I am a complete noob to the open exr bindings for python, I am running MacOSX sierra. 

I have managed to run ./configure, make and make install as dictated by the readme. However, I am lacking instructions for how to do the simplest of things, that is import the lib into python. The problem is the readme file that is part of the download for the pyilmbase doesn’t give any instructions or examples other than how to make ilmbase. So I am stuck. Any help at this stage to getting the libs to import into python would be helpful, I am attempting to use openexr bindings as part of an add-on for blender I am writing that enables distributed rendering. Openexr is the format of choice for us to send the results back to the requesting node, but in blender, the bindings are not available in the python api so we’re having to import them into our add-on from an external source, hence my attempt to build the bindings. But so far I am not having much luck. Again, any pointers or suggestions are welcome! I am targeting this add-on for windows, mac and linux too, I’ve yet to try this on windows or linux. 

I tried doing the following from a terminal.

~python

>>> import pyilmbase

Traceback (most recent call last):

  File "<stdin>", line 1, in <module>

ImportError: No module named pyilmbase

I checked the sys.path and it shows the following

['', '/Library/Python/2.7/site-packages/pip-8.1.2-py2.7.egg', '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python27.zip', '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7', '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/plat-darwin', '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/plat-mac', '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/plat-mac/lib-scriptpackages', '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/lib-tk', '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/lib-old', '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/lib-dynload', '/Library/Python/2.7/site-packages', '/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python', '/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python/PyObjC']

The output from the ./configure then make then make install commands was 

Jamess-MacBook-pro:pyilmbase-2.2.0 jamesmac$ ./configure --disable-boostpythontest

checking build system type... x86_64-apple-darwin16.6.0

checking host system type... x86_64-apple-darwin16.6.0

checking for a BSD-compatible install... /usr/bin/install -c

checking whether build environment is sane... yes

checking for a thread-safe mkdir -p... ./install-sh -c -d

checking for gawk... no

checking for mawk... no

checking for nawk... no

checking for awk... awk

checking whether make sets $(MAKE)... yes

checking whether to enable maintainer-specific portions of Makefiles... no

checking for g++... g++

checking for C++ compiler default output file name... a.out

checking whether the C++ compiler works... yes

checking whether we are cross compiling... no

checking for suffix of executables... 

checking for suffix of object files... o

checking whether we are using the GNU C++ compiler... yes

checking whether g++ accepts -g... yes

checking for style of include used by make... GNU

checking dependency style of g++... gcc3

checking for a BSD-compatible install... /usr/bin/install -c

checking whether ln -s works... yes

checking for gcc... gcc

checking whether we are using the GNU C compiler... yes

checking whether gcc accepts -g... yes

checking for gcc option to accept ISO C89... none needed

checking dependency style of gcc... gcc3

checking for a sed that does not truncate output... /usr/bin/sed

checking for grep that handles long lines and -e... /usr/bin/grep

checking for egrep... /usr/bin/grep -E

checking for fgrep... /usr/bin/grep -F

checking for ld used by gcc... /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ld

checking if the linker (/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ld) is GNU ld... no

checking for BSD- or MS-compatible name lister (nm)... /usr/bin/nm -B

checking the name lister (/usr/bin/nm -B) interface... BSD nm

checking the maximum length of command line arguments... 196608

checking whether the shell understands some XSI constructs... yes

checking whether the shell understands "+="... yes

checking for /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ld option to reload object files... -r

checking for objdump... objdump

checking how to recognize dependent libraries... pass_all

checking for ar... ar

checking for strip... strip

checking for ranlib... ranlib

checking command to parse /usr/bin/nm -B output from gcc object... ok

checking for dsymutil... dsymutil

checking for nmedit... nmedit

checking for lipo... lipo

checking for otool... otool

checking for otool64... no

checking for -single_module linker flag... yes

checking for -exported_symbols_list linker flag... yes

checking how to run the C preprocessor... gcc -E

checking for ANSI C header files... yes

checking for sys/types.h... yes

checking for sys/stat.h... yes

checking for stdlib.h... yes

checking for string.h... yes

checking for memory.h... yes

checking for strings.h... yes

checking for inttypes.h... yes

checking for stdint.h... yes

checking for unistd.h... yes

checking for dlfcn.h... yes

checking whether we are using the GNU C++ compiler... (cached) yes

checking whether g++ accepts -g... (cached) yes

checking dependency style of g++... (cached) gcc3

checking how to run the C++ preprocessor... g++ -E

checking for objdir... .libs

checking if gcc supports -fno-rtti -fno-exceptions... yes

checking for gcc option to produce PIC... -fno-common -DPIC

checking if gcc PIC flag -fno-common -DPIC works... yes

checking if gcc static flag -static works... no

checking if gcc supports -c -o file.o... yes

checking if gcc supports -c -o file.o... (cached) yes

checking whether the gcc linker (/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ld) supports shared libraries... yes

checking dynamic linker characteristics... darwin16.6.0 dyld

checking how to hardcode library paths into programs... immediate

checking whether stripping libraries is possible... yes

checking if libtool supports shared libraries... yes

checking whether to build shared libraries... yes

checking whether to build static libraries... no

checking for ld used by g++... /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ld

checking if the linker (/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ld) is GNU ld... no

checking whether the g++ linker (/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ld) supports shared libraries... yes

checking for g++ option to produce PIC... -fno-common -DPIC

checking if g++ PIC flag -fno-common -DPIC works... yes

checking if g++ static flag -static works... no

checking if g++ supports -c -o file.o... yes

checking if g++ supports -c -o file.o... (cached) yes

checking whether the g++ linker (/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ld) supports shared libraries... yes

checking dynamic linker characteristics... darwin16.6.0 dyld

checking how to hardcode library paths into programs... immediate

checking whether make sets $(MAKE)... (cached) yes

test_prefix = NONE

checking for pkg-config... /usr/local/bin/pkg-config

using pkg-config to set ILMBASE_CXXFLAGS and ILMBASE_LDFLAGS:

    ILMBASE_CXXFLAGS = -D_THREAD_SAFE -I/usr/local/include/OpenEXR

    ILMBASE_LDFLAGS = -L/usr/local/lib

    ILMBASE_LIBS = -L/usr/local/lib -lImath -lHalf -lIex -lIexMath -lIlmThread

checking for IlmBase... yes

Compiled and ran IlmBase test program.

checking for python... /Users/jamesmac/.pyenv/shims/python

checking for python version... 2.7

checking for python platform... darwin

checking for python script directory... ${prefix}/lib/python2.7/site-packages

checking for python extension module directory... ${exec_prefix}/lib/python2.7/site-packages

checking for boost::python... no

*** Could not run the boost::python test program, checking why...

*** The test program could not be compiled.  Is boost::python installed?

*** Check that the cflags (below) includes the boost::python include directory

***

*** Flags used by the test:

***     cflags: -g -O2  -I/System/Library/Frameworks/Python.framework/Versions/2.7/include/python2.7 -g -O2  -I/System/Library/Frameworks/Python.framework/Versions/2.7/include/python2.7 

***     ldflags:  -L/usr/local/lib  -L/System/Library/Frameworks/Python.framework/Versions/2.7/lib  -L/usr/local/lib  -L/System/Library/Frameworks/Python.framework/Versions/2.7/lib

***

*** You can also run configure with --disable-boostpythontest to skip this test.

configure: error: Could not compile boost::python test program.

Jamess-MacBook-pro:pyilmbase-2.2.0 jamesmac$ make

make: *** No targets specified and no makefile found.  Stop.

Jamess-MacBook-pro:pyilmbase-2.2.0 jamesmac$ make install

make: Nothing to be done for `install'.