looking at: https://pysqlite.readthedocs.org/en/latest/sqlite3.html#controlling-transactions

"commits transactions implicitly before a non-DML, non-query statement (i. e. anything other than SELECT or the aforementioned)."

no longer true, right? Just tested it and this seems to be the case. I think you'd need to refer to the new system and have a ".. versionchanged::" in there to clarify this.