openmpi

library5.0.10pypypiunverified

Open MPI is a high performance implementation of the Message Passing Interface (MPI) standard, used for parallel computing. The Python package 'openmpi' is a wrapper that provides MPI bindings for Python. Current version is 5.0.10. Release cadence is irregular, following upstream Open MPI releases.

data ai-ml

pip install openmpi

github ↗package ↗homepage ↗docs ↗

INSTALL

IMPORT

SIG · OPENMPI

openmpi

datapythonv5.0.10

harness data pending

Install & Compatibility

Where this runs

No compatibility data collected yet for this library.

Code

Verified usage

Verified import paths — ran on the pinned version, not inferred.

MPI

✓ from mpi4py import MPI

✗ from mpi4py import MPI

Initialize MPI, get rank and size, and perform a simple send/receive.

from mpi4py import MPI comm = MPI.COMM_WORLD rank = comm.Get_rank() size = comm.Get_size() print(f"Hello from rank {rank} of {size}") # Example: send and receive if rank == 0: data = {'a': 7, 'b': 3.14} comm.send(data, dest=1) elif rank == 1: data = comm.recv(source=0) print(f"Rank 1 received: {data}")

mpirun --version

Debug

Known issues

gotchaThe 'openmpi' PyPI package may not provide Python bindings directly; actual MPI programming in Python typically uses 'mpi4py'. Ensure mpi4py is installed and that the underlying Open MPI library is available on your system.

fix

Use mpi4py instead. Install via: pip install mpi4py

affects: all

breakingOpen MPI 5.x is not backward compatible with Open MPI 4.x custom MPI extensions. User-defined functions that rely on internal MPI hooks may break.

fix

Review application code for any non-standard MPI usage; consult Open MPI 5 migration guide.

affects: 5.x

deprecatedThe 'ompi' command-line tool has been deprecated in favor of 'prrte' for runtime launch. Using 'mpirun' is still supported but may emit warnings.

fix

Use 'mpirun' or switch to 'prrte' launcher if needed.

affects: 5.x

gotchaOpen MPI requires a compatible Fortran compiler at build time; if you compile from source, you may need to install gfortran. Pre-built Python wheels may not be available.

fix

Install system-level Open MPI via package manager (e.g., apt, brew) before using mpi4py.

affects: all

Upgrade

Version history

5.0.10latest on PyPI · released Feb 25, 2026

Audit

Dependencies

mpi4pyrequiredOpen MPI Python interface often relies on mpi4py for Python bindings; openmpi package may be a meta-package or wrapper.

Agent activity

2 hits · last 30 days

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Resources

githubhttps://github.com/open-mpi/ompi ↗

packagehttps://pypi.org/project/openmpi/ ↗

homepagehttps://www.open-mpi.org ↗

docshttps://www.open-mpi.org/doc/ ↗