"+1 for PyException_SetContext or similar. The C code should behave like a "finally: x.finalize()"."

If the Python callback failed in _pysqlite_step_callback() or _pysqlite_final_callback(): the exception is printed if sqlite3.enable_callback_tracebacks() has been called, or cleared otherwise.

Only one kind of exception is expected to be passed to be caller (according to sqlite unit tests): AttributeError. The changeset 020dbfdf9517 restores the behaviour of Python 3.3 for best backward compatibility.

If you want better reporting, please open a new issue.

My only concern was just to not call a Python function while an exception is set: I fixed this issue using PyErr_Fetch/PyErr_Restore. So I'm closing the issue.