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Python bindings for MPI

Project description

This package provides Python bindings for the Message Passing Interface (MPI) standard. It is implemented on top of the MPI-1/2/3 specification and exposes an API which grounds on the standard MPI-2 C++ bindings.


This package supports:

  • Convenient communication of any picklable Python object
    • point-to-point (send & receive)
    • collective (broadcast, scatter & gather, reductions)
  • Fast communication of Python object exposing the Python buffer interface (NumPy arrays, builtin bytes/string/array objects)
    • point-to-point (blocking/nonbloking/persistent send & receive)
    • collective (broadcast, block/vector scatter & gather, reductions)
  • Process groups and communication domains
    • Creation of new intra/inter communicators
    • Cartesian & graph topologies
  • Parallel input/output:
    • read & write
    • blocking/nonbloking & collective/noncollective
    • individual/shared file pointers & explicit offset
  • Dynamic process management
    • spawn & spawn multiple
    • accept/connect
    • name publishing & lookup
  • One-sided operations
    • remote memory access (put, get, accumulate)
    • passive target syncronization (start/complete & post/wait)
    • active target syncronization (lock & unlock)


Once you have a working MPI implementation and the mpicc compiler wrapper is on your search path, you can install this package

  • using pip:

    $ pip install mpi4py
  • using easy_install (deprecated):

    $ easy_install mpi4py

You can also install the in-development version of mpi4py

  • using pip:

    $ pip install git+


    $ pip install
  • using easy_install (deprecated):

    $ easy_install git+


    $ easy_install

You can also install it directly on Fedora (as well as RHEL and their derivatives using the EPEL software repository)

  • using dnf and the mpich package on x86_64:

    $ dnf install mpi4py-mpich
  • using dnf and the openmpi package on x86_64:

    $ dnf install mpi4py-openmpi

Please remember to load the correct module for your choosen MPI environment

  • for mpich package on x86_64 do:

    $ module load mpi/mpich-x86_64
    $ python -c "import mpi4py"
  • for openmpi package on x86_64 do:

    $ module load mpi/openmpi-x86_64
    $ python -c "import mpi4py"


If MPI for Python been significant to a project that leads to an academic publication, please acknowledge that fact by citing the project.

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