Error when importing some functions

Errors
1

Hi all,

I am trying to reproduce the tutorial Test problem 2: Flow past a cylinder (DFG 2D-3 benchmark) — FEniCSx tutorial to learn how to load the mesh and boundary markers in Dolfinx.

from dolfinx.io import distribute_entity_data, cell_perm_gmsh
from dolfinx.graph import create_adjacencylist

For the first line, the error that I am getting is:

ImportError: cannot import name ‘distribute_entity_data’ from ‘dolfinx.io’ (/usr/local/dolfinx-real/lib/python3.8/dist-packages/dolfinx/io.py)
ImportError: cannot import name ‘distribute_entity_data’ from ‘dolfinx.io’ (/usr/local/dolfinx-real/lib/python3.8/dist-packages/dolfinx/io.py)

and for the second line:

ModuleNotFoundError: No module named ‘dolfinx.graph’

I guess that the functions have been deleted or moved to other directories.
Does anyone know where these functions have been located?

Thanks in advance.

2

Which version of dolfinx are you running?
Could you run the following:

python3 -c "import dolfinx; import dolfinx.common; print(dolfinx.__version__, dolfinx.common.git_commit_hash)"
3

The output is:
0.3.1.0 3a937bac30f3cce1bff2f36be8be3d4c0b1081d5

4

This commit is from october (Minor MPI improvements (#1760) · FEniCS/dolfinx@3a937ba · GitHub)

Thus you Need to update your installation of DOLFINx, as the tutorial is updated to match the API as of Sort imports (#1914) · FEniCS/dolfinx@01c7e47 · GitHub

1 Like
5

I see. Thank you very much!