Something's changed with sqlite since 0.6. Once a sqlite engine is
created to a physical file the usual workaround for schema change does
not work. It works correctly on sqlite in memory and even when
reattaching from memory to a file.
from sqlalchemy import Column, Sequence, create_engine,
OK what's changed with SQLite is that file-based databases no longer use a pool
- NullPool is used by default.So below, if you want some kind of scope to
remain for the life of the Engine you'd need to switch it back to
SingletonThreadPool - however, what would be better is to procure a
