Installation of fmm (Python)

Installation of Python program

Linux/Unix environment (tested on Ubuntu 14.04), Windows (tested with Cygwin) and Mac (10.13.2).
swig 4.0.0
Python 2.7

Install requirements on Ubuntu with

sudo apt-get install swig python-dev

or on Cygwin run

apt-cyg install swig python-devel

on Mac run

brew install swig

    cd python
    mkdir build
    cd build
    cmake ..
    make

Add the build folder to the environment variable PYTHONPATH (set the PATH_TO_BUILD_FOLDER below to the absolute path of the build folder, e.g., /home/Administrator/workspace/fmm/python/build, you can run pwd to check the absolute path of the current folder):

    echo 'export PYTHONPATH=${PYTHONPATH}:PATH_TO_BUILD_FOLDER' >> ~/.bashrc
    source ~/.bashrc

Run (from the build folder)

    # Change to the parent folder which contains fmm_test.py
    cd ..
    python fmm_test.py

Screenshot

  File "fmm_test.py", line 1, in <module>
    import fmm
  ImportError: No module named fmm

Make sure that the build folder is added to the environment variable PYTHONPATH as shown above (step 2 of installation).

ImportError: dynamic module does not define init function (init_fmm)

it can be caused by multiple version of Python installed. Make sure that the default python version

which python

is the same as the Python library used in cmake build. When the following command is executed, the Python location will be printed.

cmake ..

If you have multiple version of Python installed, you can specify a specific version with

cmake .. -DPYTHON_LIBRARY=/anaconda2/lib/libpython2.7.dylib