I found this link, but it is kinda old: Docker: latest development version with python 3.8. My colleague could not find python in the container available from Installation — DOLFINx 0.3.1.0 documentation.
Im not sure if you are confusing dolfin or dolfinx.
Dolfin containers are found at:
As dolfin is no longer developed, the containers were built in 2020 and contains dolfin.
Dolfinx containers are found at Dockerhub:
https://hub.docker.com/r/dolfinx/dolfinx
The image at dockerhub was built 17 hours ago, and contains dolfinx which should be available by calling
python3 -c "import dolfinx; print(dolfinx.__version__)"
Thank you. Let me circle back after I’ve gotten a more specific trace.