Python3 error when running alembic upgrade head

Hello, we are moving to python3 and we ran into the error - is there anything we should do differently? Thanks Marco (alembic==0.8.5) INFO [alembic.runtime.migration] Context impl MySQLImpl. INFO [alembic.runtime.migration] Will assume non-transactional DDL. Traceback (most recent call last):

pyc files left in version folder create ghost history

Hi, Recently I found out that pyc files left in the version folder are loaded by alembic when computing the history. This happened after some trial and error and git rm business. Alembic thought that I had a branch and refused to upgrade. I have reproduced the basic behavior in the archive