Unable to run minimal example on Ubuntu

[meganset]

My first try failed because a numpy .h file couldn't be located:

g++ minimal.cpp -std=c++11 -I ~/anaconda3/include/python3.7m -L ~/anaconda3/lib -lpython3.7m
In file included from minimal.cpp:1:0:
matplotlibcpp.h:17:12: fatal error: numpy/arrayobject.h: No such file or directory
 #  include <numpy/arrayobject.h>

If i added an additional include path for numpy, I was able to build

g++ minimal.cpp -std=c++11 -I ~/anaconda3/include/python3.7m -I ~/anaconda3/lib/python3.7/site-packages/numpy/core/include -L ~/anaconda3/lib -lpython3.7m

but running the file, i received:

Could not find platform independent libraries <prefix>
Could not find platform dependent libraries <exec_prefix>
Consider setting $PYTHONHOME to <prefix>[:<exec_prefix>]
Fatal Python error: initfsencoding: Unable to get the locale encoding
ModuleNotFoundError: No module named 'encodings'

what am i doing wrong here..? thanks

[xlabd]

Hi, even I'm getting this error. Were you able to solve this? I'm running c++ on xeus-cling and we use matplotlib-cpp for displaying the images.

[xlabd]

If anyone gets this error, a solution for it is to force set PYTHONPATH and PYTHONHOME.

[OriLiMu]

If anyone gets this error, a solution for it is to force set PYTHONPATH and PYTHONHOME.

How to set it? in the bashrc file ?

[xlabd]

@woshichuanqilz Yes, you can do that. You can also use export to set the environment variables. I was creating a Docker image, so here is my solution. I have set the environment variables in the dockerfile itself.