python:slim does not contain _dbm

[iwamot]

python:slim

$ docker run python:slim python -c 'import dbm.ndbm'
Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "/usr/local/lib/python3.11/dbm/ndbm.py", line 3, in <module>
    from _dbm import *
ModuleNotFoundError: No module named '_dbm'

$ docker run python:slim find /usr/local/lib/python3.11/lib-dynload/ -name '*dbm*' -print
/usr/local/lib/python3.11/lib-dynload/_gdbm.cpython-311-x86_64-linux-gnu.so

python

$ docker run python python -c 'import dbm.ndbm'

$ docker run python find /usr/local/lib/python3.11/lib-dynload/ -name '*dbm*' -print
/usr/local/lib/python3.11/lib-dynload/_dbm.cpython-311-x86_64-linux-gnu.so
/usr/local/lib/python3.11/lib-dynload/_gdbm.cpython-311-x86_64-linux-gnu.so

Is it possible to include it? Or could you please advise me how to use it?

[tianon]

Hmm, interesting -- I'm not sure what we're missing -- I've tried looking in Debian's python3.X package sources for clues, and I'm coming up empty. 😕

Given that the non-slim is working, it's likely that we need to install some additional package from https://github.com/docker-library/buildpack-deps/blob/65d69325ad741cea6dee20781c1faaab2e003d87/debian/bullseye/Dockerfile (or one of the dependencies of those), but it's difficult to narrow down which one. 😅

[tianon]

Ah, doing ldd on /usr/local/lib/python3.11/lib-dynload/_dbm.cpython-311-x86_64-linux-gnu.so gives libdb-5.3.so, which is part of libdb5.3, so I bet what we need is libdb-dev? 🤔

[iwamot]

Thank you for your response.