No attribute '__qualname__' on mpi4py 3.1.6

installation
1

Dear all,

I built in virtual environment with Python 3.10.14 dolfinx 0.8.0.

I get this type of error

>>> from mpi4py import MPI
>>> mpi4py.MPI.Get_version()
(3, 1)
>>> from dolfinx import mesh
>>> domain = mesh.create_unit_square(MPI.COMM_WORLD, 8, 8, mesh.CellType.quadrilateral)
terminate called after throwing an instance of 'nanobind::python_error'
  what():  AttributeError: type object 'CellType' has no attribute '__qualname__'

I found the same error with mpi4py 4, but I has version 3.1.6

OS CentOS 7.9
gcc 11.2.0
OpenMPI 4.1.1

The installed packages in virtual environment

$ conda list
#
# Name                    Version                   Build  Channel
_libgcc_mutex             0.1                        main
_openmp_mutex             5.1                       1_gnu
bzip2                     1.0.8                h5eee18b_6
ca-certificates           2024.7.2             h06a4308_0
cffi                      1.17.1                   pypi_0    pypi
exceptiongroup            1.2.2                    pypi_0    pypi
fenics-basix              0.8.0                    pypi_0    pypi
fenics-dolfinx            0.8.0                    pypi_0    pypi
fenics-ffcx               0.8.0                    pypi_0    pypi
fenics-ufl                2024.1.0                 pypi_0    pypi
gmp                       6.2.1                h295c915_3
gmpy2                     2.1.2           py310heeb90bb_0
iniconfig                 2.0.0                    pypi_0    pypi
ld_impl_linux-64          2.38                 h1181459_1
libffi                    3.4.4                h6a678d5_1
libgcc-ng                 11.2.0               h1234567_1
libgomp                   11.2.0               h1234567_1
libstdcxx-ng              11.2.0               h1234567_1
libuuid                   1.41.5               h5eee18b_0
mpc                       1.1.0                h10f8cd9_1
mpfr                      4.0.2                hb69a4c5_1
mpi4py                    3.1.6                    pypi_0    pypi
mpmath                    1.3.0           py310h06a4308_0
nanobind                  1.9.2                    pypi_0    pypi
ncurses                   6.4                  h6a678d5_0
numpy                     2.0.0                    pypi_0    pypi
openssl                   3.0.15               h5eee18b_0
packaging                 24.1                     pypi_0    pypi
petsc4py                  3.21.3                   pypi_0    pypi
pip                       24.2            py310h06a4308_0
pluggy                    1.5.0                    pypi_0    pypi
pybind11                  2.12.0                   pypi_0    pypi
pycparser                 2.22                     pypi_0    pypi
pytest                    8.3.3                    pypi_0    pypi
python                    3.10.14              h955ad1f_1
readline                  8.2                  h5eee18b_0
setuptools                72.1.0          py310h06a4308_0
slepc4py                  3.21.1                   pypi_0    pypi
sqlite                    3.45.3               h5eee18b_0
sympy                     1.13.2          py310h06a4308_0
tk                        8.6.14               h39e8969_0
tomli                     2.0.1                    pypi_0    pypi
tzdata                    2024a                h04d1e81_0
wheel                     0.44.0          py310h06a4308_0
xz                        5.4.6                h5eee18b_1
zlib                      1.2.13               h5eee18b_1

This packages I built from sources and after this made pip install . where it was needed

  • basix-0.8.0
  • boost-1.85.0
  • dolfinx-0.8.0
  • ffcx-0.8.0
  • flex-2.6.4
  • hdf5-1.14.4.2
  • lapack-3.12.0
  • mpi4py-3.1.6
  • nanobind-1.9.2
  • petsc-3.21.3
  • pugixml-1.14
  • pybind11-2.12.0
  • scalapack-2.2.1
  • slepc-3.21.1
  • ufl-2024.1.0
2

We have seen this in the past at No attribute '__qualname__' due to mpi4py 4.0.0 , although the error there was about mpi4py 4.0, and downgrading to 3.1 fixed the issue.

Is there a specific reason why you are using mpi4py from pypi rather than from conda? It’s likely that the conda package expects mpi4py to be installed from conda rather than pypi.

3

Thank you for answer,

I installed mpi4py from sources via MPICC=$(which mpicc) pip install .
Now reinstall from conda (3.1.4). But error still the same.

I saw this task, but my version is 3.1.6.

4

Is there a reason you mix conda and source installation? It is not adviced as you need to be very careful about what mpi implementations are picked up.

5

Thank you in advance. Installation from conda is working correct.