Installing mpi4py

Question

I am trying to install mpi4py in my Linux machine. I have recently installed anaconda 4.1.1 and according to their documentation the package is suppose to come with mpi4py 2.0.0. When I tried verifying with "conda list" I am not able to find the package in the list.

I have tried "pip install mpi4py" and I am getting an error like this "Failed building wheel for mpi4py" I had no luck with "easy_install mpi4py" as well.

Answer 1

When installing mpi4py, your MPI binaries has to be on the PATH. That is, if you type e.g. which mpiexec and nothing comes up, you have to run

export PATH="/path/to/mpi/bin:${PATH}"

Now which mpiexec should print the path of the MPI executable, and so pip and conda should be able to locate MPI.

Answer 2

It looks like you are missing a dependency. See this link for a possible explanation.