ImportError: No module named 'pysqlite2' when running tests in Python 3 Ubuntu

Question

Some background: we have a codebase written in Python 3 that uses Pyramid and the SqlAlchemy ORM to persist to a mysql database. To write tests for our classes using the ORM

Answer 1

Running Debian Buster, I discovered the same problem with python3.6, even though, python3.5 successfully imported sqlite3. And even though the sqlite3 module was installed and should have been available to python3.6. My solution was to run

export PYTHONPATH=$PYTHONPATH:/usr/lib/python3.6/lib-dynload

For some reason I have not yet determined, the module directory for python3.6 does not get loaded correctly for sqlite3. This solution worked both inside and outside of virtual environments.