Module 'firedrake' has no attribute 'Cofunction'

[awaham]

I am having issues import mesh from firedrake (see below). I am using Ubuntu-20.04 (WSL).

Python 3.12.3 (main, Nov 6 2024, 18:32:19) [GCC 13.2.0] on linux
Type "help", "copyright", "credits" or "license" for more information.

from firedrake import mesh
Traceback (most recent call last):
File "", line 1, in
File "/home/firedrake/firedrake/src/firedrake/firedrake/mesh.py", line 37, in
from firedrake.adjoint_utils import MeshGeometryMixin
File "/home/firedrake/firedrake/src/firedrake/firedrake/adjoint_utils/init.py", line 8, in
from firedrake.adjoint_utils.function import * # noqa: F401
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/home/firedrake/firedrake/src/firedrake/firedrake/adjoint_utils/function.py", line 6, in
from firedrake.adjoint_utils.blocks import FunctionAssignBlock, ProjectBlock, SubfunctionBlock, FunctionMergeBlock, SupermeshProjectBlock
File "/home/firedrake/firedrake/src/firedrake/firedrake/adjoint_utils/blocks/init.py", line 5, in
from .function import FunctionAssignBlock, FunctionMergeBlock,
File "/home/firedrake/firedrake/src/firedrake/firedrake/adjoint_utils/blocks/function.py", line 273, in
class CofunctionAssignBlock(Block):
File "/home/firedrake/firedrake/src/firedrake/firedrake/adjoint_utils/blocks/function.py", line 287, in CofunctionAssignBlock
def init(self, lhs: firedrake.Cofunction, rhs: firedrake.Cofunction,
^^^^^^^^^^^^^^^^^^^^
AttributeError: module 'firedrake' has no attribute 'Cofunction'

Any help will be appreciated.

[connorjward]

How recent is your Firedrake installation? Can you share the install logs?

[awaham]

I did the installation a week ago. Below is the install log.
firedrake-install.log

[connorjward]

This looks fine. Odd.

Import errors are strange because you should only be dealing with standard Python packages at this point. Can you check:

• That your virtual environment is activated
• That the file $VIRTUAL_ENV/src/firedrake/firedrake/cofunction.py exists
• Whether it is possible to run python -c "from firedrake.cofunction import Cofunction".

It might be possible that Python is incorrectly assuming that another folder called firedrake (e.g. the venv itself) is a Python package. Sometimes it can be helpful to cd to a different directory and try again.

[jrmaddison]

I hit this error when I have a firedrake subdirectory in the current working directory. Empty PYTHONPATH and a fairly standard install on Ubuntu 24.04.

[dham]

Argh yes. That's an irritating side effect of editable mode installs.